Unusual experiments in chemistry. Water that does not spill

How to interest a child in the knowledge of new substances and the properties of various objects and liquids? At home, you can arrange an impromptu chemical laboratory and conduct simple chemical experiments for children at home.

Transformations will be original and appropriate in honor of any festive event or in the most normal conditions to familiarize the child with the properties of different materials. Here are some simple magic tricks that are easy to do at home.

Chemical experiments using ink

Take a small container with water, preferably with transparent walls.

Dissolve a drop of ink or ink in it - the water will turn blue.

Add one tablet to the solution activated carbon pre-shredded.

Then shake the container well and you will see that it will gradually become light, without a shade of paint. Charcoal powder has an absorbent property, and the water takes on its original color.

https://galaset.ru/holidays/contests/tests.html

Trying to create clouds at home

Take a tall jar and pour some hot water(about 3 cm). Prepare ice cubes in the freezer and place them on a flat baking sheet, which you place on top of the jar.

The hot air in the jar will cool, forming water vapor. The molecules of the condensate will begin to clump together in the form of a cloud. This transformation demonstrates the origin of clouds in nature when warm air is cooled. Why is it raining?

Drops of water on the ground are heated and rise up. There they cool and meet each other to form into clouds. Then the clouds also combine into heavy formations, and fall to the ground as precipitation. Watch a video of chemical experiments for children at home.

Feelings for hands at different water temperatures

You will need three deep bowls of water - cold, hot and room temperature.

The child must touch with one hand cold water and the other is hot.

After a couple of minutes, both hands are placed in a vessel with water at room temperature. How does water feel to him? Is there a difference in perception temperature?

Water can soak up and stain the plant

For this beautiful transformation, you need a living plant or flower stem.

Place it in a glass of water dyed in any bright color (red, blue, yellow).

Gradually notice that the plant turns the same color.

This happens because the stem absorbs water and takes on its color. In the language of chemical phenomena, such a process is usually called osmosis or one-way diffusion.

You can make a fire extinguisher yourself at home

Necessary actions:

1. Let's take a candle.
2. It is necessary to light it, and place it in a jar so that it stands straight, and the flame does not reach its edges.
3. Carefully place a teaspoon of baking powder into the jar.
4. Then pour a little bit of vinegar into it.

Next, look at the transformation - White powder baking powder will hiss, forming foam, and the candle will go out. This interaction of two substances provides the formation of carbon dioxide. It sinks to the bottom of the jar because it is heavy compared to other atmospheric gases.

The fire does not get access to oxygen and goes out. It is this principle that is laid down in the device of a fire extinguisher. All of them contain carbon dioxide that puts out the flames of fire.

What else you need to read:

Oranges can float on water

If an orange is placed in a bowl of water, it will not sink. Clean it and dip it in water again - you will see it at the bottom. How did it happen?

The peel of an orange has air bubbles on which it floats on the water, almost like on an air mattress.

Checking the ability of eggs to float on water

We use water cans again. Put a couple of tablespoons of salt in one of them and stir until dissolved. Dip an egg in each of the jars. In salt water, it will be on the surface, and in normal water, it will sink to the bottom.

And get to know with them world and wonders of physical phenomena? Then we invite you to our "experimental laboratory", in which we will tell you how to create simple, but very interesting experiments for children.

Egg experiments

Egg with salt

The egg will sink to the bottom if you place it in a glass of plain water, but what happens if you add salt? The result is very interesting and can visually show interesting density facts.

You will need:

• Salt
• Tumbler.

Instruction:

1. Fill half the glass with water.

2. Add a lot of salt to the glass (about 6 tablespoons).

3. We interfere.

4. We carefully lower the egg into the water and observe what is happening.

Explanation

Salt water has a higher density than regular tap water. It is the salt that brings the egg to the surface. And if you add to an existing salt water fresh, the egg will gradually sink to the bottom.

Egg in a bottle

Do you know what boiled whole egg can be easily put into a bottle?

You will need:

• A bottle with a neck diameter smaller than the diameter of the egg
• boiled egg hard boiled
• Matches
• some paper
• Vegetable oil.

Instruction:

1. Lubricate the neck of the bottle with vegetable oil.

2. Now set fire to the paper (you can just have a few matches) and immediately throw it into the bottle.

3. Put an egg on the neck.

When the fire goes out, the egg will be inside the bottle.

Explanation

The fire provokes the heating of the air in the bottle, which comes out. After the fire goes out, the air in the bottle will begin to cool and contract. Therefore, a low pressure is formed in the bottle, and the external pressure pushes the egg into the bottle.

The balloon experiment

This experiment shows how rubber and orange peel interact with each other.

You will need:

• Balloon
• Orange.

Instruction:

1. Blow up the balloon.

2. Peel an orange, but orange peel(zest) do not throw away.

3. Squeeze out orange peel over the ball, after which it will burst.

Explanation.

Orange peel contains limonene. It is able to dissolve rubber, which is what happens to the ball.

candle experiment

An interesting experiment showing burning a candle in the distance.

You will need:

• regular candle
• Matches or lighter.

Instruction:

1. Light a candle.

2. Extinguish it after a few seconds.

3. Now bring the burning flame to the smoke coming from the candle. The candle will start burning again.

Explanation

The smoke rising from an extinguished candle contains paraffin, which quickly ignites. The burning vapors of paraffin reach the wick, and the candle begins to burn again.

Vinegar Soda

A balloon that inflates itself is a very interesting sight.

You will need:

• Bottle
• A glass of vinegar
• 4 teaspoons of soda
• Balloon.

Instruction:

1. Pour a glass of vinegar into the bottle.

2. Pour the soda into the bowl.

3. We put the ball on the neck of the bottle.

4. Slowly put the ball vertically, while pouring soda into a bottle of vinegar.

5. Watching the balloon inflate.

Explanation

When baking soda is added to vinegar, a process called soda quenching takes place. During this process, carbon dioxide is released, which inflates our balloon.

invisible ink

Play with your child as a secret agent and create your invisible ink.

You will need:

• half a lemon
• Spoon
• A bowl
• Cotton swab
• White paper
• Lamp.

Instruction:

1. Squeeze some lemon juice into a bowl and add the same amount of water.

2. Dip a cotton swab into the mixture and write something on the white paper.

3. Wait for the juice to dry and become completely invisible.

4. When you're ready to read the secret message or show it to someone else, heat the paper by holding it close to a light bulb or fire.

Explanation

Lemon juice is an organic substance that oxidizes and turns brown when heated. Diluted lemon juice in water makes it hard to see on paper, and no one will know there's lemon juice in there until it's hot.

Other substances which work in the same way:

• Orange juice
• Milk
• onion juice
• Vinegar
• Wine.

How to make lava

You will need:

• Sunflower oil
• Juice or food coloring
• Transparent vessel (can be a glass)
• Any effervescent tablets.

Instruction:

1. First, pour the juice into a glass so that it fills about 70% of the volume of the container.

2. Fill the rest of the glass with sunflower oil.

3. Now we are waiting for the juice to separate from the sunflower oil.

4. We throw a pill into a glass and observe an effect similar to lava. When the tablet dissolves, you can throw another one.

Explanation

The oil separates from the water because it has a lower density. Dissolving in the juice, the tablet releases carbon dioxide, which captures parts of the juice and lifts it up. The gas is completely out of the glass when it reaches the top, and the juice particles fall back down.

The tablet hisses due to the fact that it contains citric acid and soda (sodium bicarbonate). Both of these ingredients react with water to form sodium citrate and carbon dioxide gas.

Ice experiment

At first glance, you might think that the ice cube, being on top, will eventually melt, due to which it should cause the water to spill, but is it really so?

You will need:

• Cup
• Ice cubes.

Instruction:

1. Fill up a glass warm water to the very edge.

2. Lower the ice cubes carefully.

3. Watch the water level carefully.

As the ice melts, the water level does not change at all.

Explanation

When water freezes, turning into ice, it expands, increasing its volume (which is why even heating pipes can burst in winter). Water from melted ice takes up less space than the ice itself. So when the ice cube melts, the water level stays about the same.

How to make a parachute

find out about air resistance making a small parachute.

You will need:

• Plastic bag or other lightweight material
• Scissors
• A small load (perhaps some figurine).

Instruction:

1. Cut out a large square from a plastic bag.

2. Now we cut the edges so that we get an octagon (eight identical sides).

3. Now we tie 8 pieces of thread to each corner.

4. Don't forget to make a small hole in the middle of the parachute.

5. Tie the other ends of the threads to a small load.

6. Use a chair or find a high point to launch the parachute and check how it flies. Remember that the parachute should fly as slowly as possible.

Explanation

When the parachute is released, the load pulls it down, but with the help of the lines, the parachute occupies a large area that resists the air, due to which the load slowly lowers. The larger the surface area of ​​the parachute, the more this surface resists falling, and the slower the parachute will descend.

A small hole in the middle of the parachute allows air to flow through it slowly, rather than flopping the parachute to one side.

How to make a tornado

Find out, how to make a tornado in a bottle with this fun scientific experiment for children. The items used in the experiment are easy to find in everyday life. Made homemade mini tornado much safer than the tornado that is shown on television in the steppes of America.

All children, without exception, love mysterious, mysterious and unusual phenomena. Most children really like to conduct interesting experiments, some of which do not seek help from parents or other adults.

Experiments that can be done with children

Not all experiences are suitable for children. Some of them can be a danger to the life and health of babies, especially preschool age. However, under the supervision and supervision of parents or other adults, the child may entertaining experiment- the main thing is to carefully monitor compliance with the necessary safety requirements.

All scientific experiments extremely useful for children. They allow young inventors to visually get acquainted with the properties of various substances and objects, chemical compounds and much more, understand the causes of certain phenomena and acquire valuable practical experience which can be applied later in life. In addition, some of these experiments can be shown as tricks, thanks to which the child will be able to gain authority among his friends and buddies.

Water experiments for children

All people in everyday life very often use water and do not think at all that it has truly magical and amazing properties. Meanwhile, with this liquid you can spend incredibly with children. For example, boys and girls at home can do the following experiments:

Experiments with fire for children

You should be especially careful with fire, but it is with it that you can put incredibly interesting experiments for children. Try one of the following experiments with your offspring:

Salt experiments for children

Entertaining experiments for children can also be carried out with bulk substances, for example, with salt. Children will definitely enjoy such experiments as:

Experiments with soda for children

Not less than spectacular experiences for children can be carried out with baking soda, for example, "Volcano". Place a small plastic bottle on the table and mold a clay or sand volcano around it. Pour 2 tablespoons of soda into a container, add approximately 50-70 ml of warm water, a few drops of red food coloring, and at the very end - a quarter cup of vinegar. A real volcanic eruption will happen before your eyes, and the child will be delighted.

Other experiments for children with baking soda can be built on the property of this substance to crystallize. To obtain crystals, You can use the same method as in the case of salt. To do this, you need to prepare a dense soda solution, in which the bulk substance no longer dissolves, and then place a metal wire or other object there and leave it for several days in a warm place. The result will not be long in coming.

Balloon experiments for kids

Often experiments and experiments for children are associated with various properties balloons, such as:

Experiments with eggs for children

Some interesting experiments with children can be done using chicken eggs, For example:

Experiments with lemon for children

Anything can be used to conduct experiments. Interesting experiments with lemon deserve special attention, for example:

Experiments with paints for children

All kids love to draw, but it will be even more interesting for them to spend entertaining experiences with paints. Try one of the following experiments:

Such a complex but interesting science as chemistry always causes an ambiguous reaction among schoolchildren. The children are interested in experiments, as a result of which substances are obtained bright colors, gases are released or precipitation occurs. Here are the complicated equations. chemical processes only a few of them like to write.

The Importance of Entertaining Experiences

According to modern federal standards in general education schools, such a subject of the program as chemistry was also not left without attention.

As part of the study of complex transformations of substances and solving practical problems young chemist in practice hones his skills and abilities. It is in the course of unusual experiments that the teacher forms an interest in the subject in his pupils. But in ordinary lessons it is difficult for a teacher to find enough free time for non-standard experiments, and there is simply no time to spend for children.

To remedy this, additional elective and elective courses were invented. By the way, many children who are fond of chemistry in grades 8-9 become doctors, pharmacists, scientists in the future, because in such classes a young chemist gets the opportunity to independently conduct experiments and draw conclusions from them.

What courses are associated with entertaining chemistry experiments?

In the old days, chemistry for children was available only from the 8th grade. No special courses or extracurricular activities in the field of chemistry were offered to children. In fact, there was simply no work with gifted children in chemistry, which had a negative impact on the attitude of schoolchildren to this discipline. The guys were afraid and did not understand complex chemical reactions, they made mistakes in writing ionic equations.

In connection with the reform of the modern education system, the situation has changed. Now in educational institutions offered in the lower grades. The children are happy to do the tasks that the teacher offers them, learn to draw conclusions.

Optional courses related to chemistry help high school students gain skills in working with laboratory equipment, and those designed for younger students contain vivid, demonstrative chemical experiments. For example, children study the properties of milk, get acquainted with those substances that are obtained when it is sour.

Experiments with water

Entertaining chemistry for children is interesting when, during the experiment, they see an unusual result: gas evolution, bright color, unusual sediment. A substance such as water is considered ideal for conducting a variety of entertaining chemical experiments for schoolchildren.

For example, chemistry for children of 7 years old may begin with an acquaintance with its properties. The teacher tells the children that most of our planet is covered with water. The teacher also informs the pupils that in a watermelon it is more than 90 percent, and in a person - about 65-70%. Having told schoolchildren about how important water is for humans, we can offer them some interesting experiments. At the same time, it is worth emphasizing the “magic” of water in order to intrigue schoolchildren.

By the way, in this case standard set chemistry for children does not involve any expensive equipment - it is quite possible to limit yourself to available devices and materials.

Experience "Ice Needle"

Let us give an example of such a simple and also time interesting experiment with water. This is a building of ice sculpture - "needles". For the experiment you will need:

• water;
• salt;
• ice cubes.

The duration of the experiment is 2 hours, so such an experiment cannot be carried out in a regular lesson. First you need to pour water into the ice mold, put in freezer. After 1-2 hours, after the water turns into ice, entertaining chemistry may continue. For the experience, you will need 40-50 ready-made ice cubes.

First, the children must lay out 18 cubes on the table in the form of a square, leaving an empty space in the center. Then, after sprinkling them with table salt, they are carefully applied to each other, thus gluing together.

Gradually, all the cubes are connected, and as a result, a thick and long “needle” of ice is obtained. To make it, 2 teaspoons are enough. table salt and 50 small pieces ice.

It is possible, by tinting the water, to make ice sculptures multicolored. And as a result of such a simple experience, chemistry for children of 9 years old becomes an understandable and exciting science. You can experiment by gluing ice cubes in the form of a pyramid or rhombus.

Experiment "Tornado"

This experiment will not require special materials, reagents and tools. The guys will be able to make it in 10-15 minutes. For the experiment, stock up:

• a plastic transparent bottle with a cap;
• water;
• dishwashing detergent;
• sequins.

The bottle must be filled 2/3 with plain water. Then add 1-2 drops of dishwashing detergent to it. After 5-10 seconds, pour a couple of pinches of sparkles into the bottle. Tighten the cap tightly, turn the bottle upside down, holding the neck, and twist clockwise. Then we stop and look at the resulting vortex. Until the moment the "tornado" works, you will have to scroll the bottle 3-4 times.

Why does a "tornado" appear in an ordinary bottle?

When a child makes circular movements, a whirlwind similar to a tornado appears. The rotation of water around the center occurs due to the action of centrifugal force. The teacher tells the children about how terrible tornadoes are in nature.

Such an experience is absolutely safe, but after it, chemistry for children becomes a truly fabulous science. To make the experiment more vivid, you can use a coloring agent, for example, potassium permanganate (potassium permanganate).

Experiment "Soap Bubbles"

Want to teach kids what fun chemistry is? Programs for children do not allow the teacher to pay due attention to experiments in the lessons, there is simply no time for this. So, let's do this optionally.

For elementary school students, this experiment will bring a lot of positive emotions, and you can do it in a few minutes. We will need:

• liquid soap;
• jar;
• water;
• thin wire.

In a jar, mix one part liquid soap with six parts water. We bend the end of a small piece of wire in the form of a ring, lower it into soap mixture, carefully pull out and blow out of the mold a beautiful soap bubble of our own making.

Only wire that does not have a nylon layer is suitable for this experiment. Else blow out bubble kids can't.

To make it more interesting for the guys, you can add to soap solution food coloring. You can arrange soap competitions between schoolchildren, then chemistry for children will become a real holiday. The teacher thus introduces the children to the concept of solutions, solubility and explains the reasons for the appearance of bubbles.

Entertaining experience "Water from plants"

To begin with, the teacher explains how important water is for cells in living organisms. It is with the help of it that transportation takes place nutrients. The teacher notes that in case of insufficient amount of water in the body, all living things die.

For the experiment you will need:

• spirit lamp;
• test tubes;
• green leaves;
• test tube holder;
• copper sulfate (2);
• beaker.

This experiment will take 1.5-2 hours, but as a result, chemistry for children will be a manifestation of a miracle, a symbol of magic.

Green leaves are placed in a test tube, fixed in the holder. In the flame of an alcohol lamp, you need to heat the entire test tube 2-3 times, and then this is done only with the part where the green leaves are.

The glass should be placed so that the gaseous substances released in the test tube fall into it. As soon as the heating is completed, to a drop of the liquid obtained inside the glass, add grains of white anhydrous copper sulfate. Gradually White color disappears, and copper sulfate becomes blue or blue.

This experience leads children to complete delight, because the color of substances changes before their eyes. At the end of the experiment, the teacher tells the children about such a property as hygroscopicity. It is due to its ability to absorb water vapor (moisture) that white copper sulfate changes its color to blue.

Experiment "Magic Wand"

This experiment is suitable for an introductory lesson in an elective course in chemistry. First, you need to make a star-shaped blank from it and soak it in a solution of phenolphthalein (indicator).

During the experiment itself attached to " magic wand"The star is first immersed in an alkali solution (for example, in a solution of sodium hydroxide). Children see how in a matter of seconds it changes color and a bright crimson color appears. Next, the colored form is placed in an acid solution (for the experiment, the use of a hydrochloric acid solution would be optimal ), and the crimson color disappears - the asterisk becomes colorless again.

If the experiment is carried out for kids, during the experiment the teacher tells a "chemical fairy tale". For example, the hero of a fairy tale can be an inquisitive mouse who wanted to know why there are so many bright colors in a magical land. For students in grades 8-9, the teacher introduces the concept of "indicator" and notes which indicators can determine the acidic environment, and which substances are needed to determine the alkaline environment of solutions.

The Genie in the Bottle Experience

This experiment is demonstrated by the teacher himself, using a special fume hood. The experience is based on the specific properties of concentrated nitric acid. Unlike many acids, concentrated nitric acid is able to enter into chemical interaction with metals located after hydrogen (with the exception of platinum, gold).

Pour it into a test tube and add a piece of copper wire there. Under the hood, the test tube is heated, and the children observe the appearance of “red gin” vapors.

For students in grades 8-9, the teacher writes an equation chemical reaction, highlights signs of its flow (discoloration, the appearance of gas). This experience is not suitable for demonstration outside the walls of the school chemistry room. According to safety regulations, it involves the use of nitric oxide vapors (“brown gas”) are dangerous for children.

Home experiments

In order to warm up the interest of schoolchildren in chemistry, you can offer a home experiment. For example, to conduct an experiment on growing salt crystals.

The child must prepare saturated solution table salt. Then place a thin branch in it, and, as the water evaporates from the solution, salt crystals will “grow” on the branch.

The jar of solution must not be shaken or rotated. And when after 2 weeks the crystals grow, the stick must be very carefully removed from the solution and dried. And then, if desired, you can cover the product with a colorless varnish.

Conclusion

IN school curriculum there is no more interesting subject than chemistry. But in order for children not to be afraid of this complex science, the teacher must devote sufficient time in his work to entertaining experiments and unusual experiments.

It is the practical skills that are formed in the course of such work that will help stimulate interest in the subject. And in the lower grades, entertaining experiments are considered by the Federal State Educational Standards as an independent project and research activity.

Children are always trying to learn something new every day and they always have a lot of questions. They can explain some phenomena, or you can clearly show how this or that thing, this or that phenomenon works. In these experiments, children will not only learn something new, but also learn how to create different crafts, which they can then play with.

1. Experiments for children: lemon volcano

You will need:

– 2 lemons (for 1 volcano)

- baking soda

- food coloring or watercolors

- dishwashing liquid

- wooden stick or spoon (optional)

- tray.

1. Cut off the bottom of the lemon so that it can be placed on flat surface.

2. On the reverse side, cut a piece of lemon as shown in the image.

* You can cut half a lemon and make an open volcano.

3. Take the second lemon, cut it in half and squeeze the juice out of it into a cup. This will be the backup lemon juice.

4. Place the first lemon (with the part cut out) on the tray and spoon "remember" the lemon inside to squeeze out some of the juice. It is important that the juice is inside the lemon.

5. Add food coloring or watercolor to the inside of the lemon, but do not stir.

6. Pour dishwashing liquid inside the lemon.

7. Add a full spoonful to the lemon baking soda. The reaction will start. With a stick or spoon, you can stir everything inside the lemon - the volcano will begin to foam.

8. To make the reaction last longer, you can gradually add more soda, dyes, soap and reserve lemon juice.

2. Home experiments for children: electric eels from chewing worms

You will need:

- 2 glasses

- small capacity

- 4-6 chewing worms

- 3 tablespoons of baking soda

- 1/2 tablespoon of vinegar

– 1 cup of water

- scissors, kitchen or clerical knife.

1. With scissors or a knife, cut lengthwise (just lengthwise - this will not be easy, but be patient) of each worm into 4 (or more) parts.

* How smaller piece, all the better.

* If scissors don't want to cut properly, try washing them with soap and water.

2. Mix water and baking soda in a glass.

3. Add pieces of worms to the solution of water and soda and stir.

4. Leave the worms in the solution for 10-15 minutes.

5. Using a fork, transfer the worm pieces to a small plate.

6. Pour half a spoon of vinegar into an empty glass and start putting worms in it one by one.

* The experiment can be repeated if the worms are washed with plain water. After a few attempts, your worms will begin to dissolve, and then you will have to cut a new batch.

3. Experiments and experiments: a rainbow on paper or how light is reflected on a flat surface

You will need:

- a bowl of water

– clear nail polish

- small pieces of black paper.

1. Add 1-2 drops of clear nail polish to a bowl of water. See how the varnish disperses through the water.

2. Quickly (after 10 seconds) dip a piece of black paper into the bowl. Take it out and let it dry on a paper towel.

3. After the paper has dried (it happens quickly) start turning the paper and look at the rainbow that is displayed on it.

* To better see the rainbow on paper, look at it under the sun's rays.

4. Experiments at home: a rain cloud in a jar

When small drops of water accumulate in a cloud, they become heavier and heavier. As a result, they will reach such a weight that they can no longer remain in the air and will begin to fall to the ground - this is how rain appears.

This phenomenon can be shown to children with simple materials.

You will need:

- shaving foam

- food coloring.

1. Fill the jar with water.

2. Apply shaving foam on top - it will be a cloud.

3. Let the child begin to drip the food coloring onto the “cloud” until it starts to “rain” – drops of food coloring begin to fall to the bottom of the jar.

During the experiment, explain this phenomenon to kid.

You will need:

– warm water

– sunflower oil

- 4 food colorings

1. Fill the jar 3/4 full with warm water.

2. Take a bowl and mix 3-4 tablespoons of oil and a few drops of food coloring in it. In this example, 1 drop of each of the 4 dyes was used - red, yellow, blue and green.

3. Stir the dyes and oil with a fork.

4. Carefully pour the mixture into a jar of warm water.

5. Watch what happens - food coloring will slowly sink through the oil into the water, after which each drop will begin to disperse and mix with other drops.

* Food coloring dissolves in water, but not in oil, because. oil density less water(that's why it "floats" on the water). A drop of dye is heavier than oil, so it will begin to sink until it reaches the water, where it begins to disperse and look like a small firework.

6. Interesting experiences: in a bowl in which colors merge

You will need:

- a paper-cut wheel painted in the colors of the rainbow

- rubber band or thick thread

– cardboard

- glue stick

- scissors

- skewer or screwdriver (to make holes in the paper wheel).

1. Choose and print the two templates you want to use.

2. Take a piece of cardboard and use a glue stick to glue one template to the cardboard.

3. Cut out the glued circle from the cardboard.

4. TO reverse side glue the second template on the cardboard circle.

5. Use a skewer or screwdriver to make two holes in the circle.

6. Pass the thread through the holes and tie the ends into a knot.

Now you can spin your spinning top and watch how the colors merge on the circles.

7. Experiments for children at home: jellyfish in a jar

You will need:

- small transparent plastic bag

– transparent plastic bottle

- food coloring

- scissors.

1. Lay the plastic bag on a flat surface and smooth it out.

2. Cut off the bottom and handles of the bag.

3. Cut the bag lengthwise on the right and left so that you have two sheets of polyethylene. You will need one sheet.

4. Find the center of the plastic sheet and fold it like a ball to make a jellyfish head. Tie the thread around the “neck” of the jellyfish, but not too tight - you need to leave a small hole through which to pour water into the head of the jellyfish.

5. There is a head, now let's move on to the tentacles. Make cuts in the sheet - from the bottom to the head. You need about 8-10 tentacles.

6. Cut each tentacle into 3-4 smaller pieces.

7. Pour some water into the jellyfish's head, leaving room for air so the jellyfish can "float" in the bottle.

8. Fill the bottle with water and put your jellyfish in it.

9. Drop a couple of drops of blue or green food coloring.

* Close the lid tightly so that water does not spill out.

* Have the children turn the bottle over and watch the jellyfish swim in it.

8. Chemical experiments: magic crystals in a glass

You will need:

- glass cup or bowl

- plastic bowl

- 1 cup Epsom salt (magnesium sulfate) - used in bath salts

- 1 cup hot water

- food coloring.

1. Pour Epsom salt into a bowl and add hot water. You can add a couple of drops of food coloring to the bowl.

2. Stir the contents of the bowl for 1-2 minutes. Most of the salt granules should dissolve.

3. Pour the solution into a glass or glass and place it in the freezer for 10-15 minutes. Don't worry, the solution isn't hot enough to crack the glass.

2