Note- Adult supervision is must for all these activities
Pencil in the Plastic Bag with Water-This is a very simple and easy activity that can be done with a plastic bag and and a pencil.
2. A plastic bag
What to do ? - Fill the bag with water about three quarters and seal it well. Ask someone to hold the bag. Now very carefully and gently stick the pointed end of pencil through one side of the bag and push the pencil in until it starts coming out of the other side of the bag as well.
What do you see? You will see that no water leaks out from the bag.
How does it happen? The plastic bags is made up of polymer and polymers have long chains of flexible molecules.When you stick a pencil in the bag these flexible molecule chains create a seal around the pencil and that's why the water doesn't leak out.
Roll a Can with Balloon- Yes! You can make a balloon roll with the help of a balloon by creating static electricity.
Things you need- 1. An empty and dry cola can
2. One inflated balloon
3. A head full with hair
What to do? - Place the can on a flat and smooth surface like a table or floor.Hold the inflated balloon in your hand and rub it back and forth on your hair really fast for sometime to charge the balloon.If the balloon is charged enough your hair will stick to it as you move it away from your head. Now keep the balloon close to the can without touching it. Now slowly move the balloon away from the can.
What do you see? -You will see that the can starts rolling and follows the balloon.
How does it happen- This happens because of Static Electricity. When you rub the balloon on your hair, the negative charges from the hair are transferred to the balloon and the balloon becomes negatively charged. The can contains both positive and negative charges, so when you bring the balloon close to the can the positive charges of the can attract to the negative charges of the balloon and that is why the can starts rolling toward the balloon.
Make A String Phone With Plastic Cups- A string phone may be old fashioned but it's great fun to talk and hear with it.You will surely enjoy this simple experiment.
Things you need- 1. Two plastic cups
2. 10 feet cotton thread or kite string
3. Two toothpicks
4. A sharpened pencil to poke the holes
What to do- Make a hole at the bottom of each cup with the pencil. You can ask your parents or teacher to help you with this. Now tie one toothpick to one end of the string and thread the loose end of the string through the hole of one of the cups from inside of it. Now take the other cup and thread the string through it's hole from the outside of the cup. Tie the second toothpick to the end of the string inside of the cup. Now both the toothpicks are inside both of the cups. Now your phone is ready to use. Hold one cup yourself and give the other cup to your friend. Slowly and carefully walk apart until the string becomes tight and straight.Now one person has to place the one cup over his/her ear and the second person has to talk into the other cup.
What do you find? - You can talk to and hear each other with the help of your string phone.
How does it happen? - When a person speaks into one cup, the bottom of the cup vibrates and the sound waves occur and these sound waves or vibrations travel through the string and reach into the bottom of other person's cup,which makes the air inside of that cup vibrate and a detectable sound is produced.
Blow up a Balloon With Hot Water- Blowing up a balloon with hot water is a fun experiment, so let's see that how does it happen.
Things you need- 1. A plastic bottle
3. A pot filled with hot water
Note-This activity should be done by an adult to show the kids because water used for this activity is pretty hot so do it
What to do? - Put the balloon on the top of the bottle. Now put the bottle in the pot of hot water and hold it there.
What do you see? -You will see that almost instantly the balloon blows up.The balloon does not blow up very big but it expands.
How does it happen? - When you stick the bottle in the hot water the hot water heats up the air in the bottle and the warm air rises up. The air rises up because the molecules in the air are heated up and spread up becoming less dense and lighter. So the air in the bottle expands and takes up the space in the balloon and the balloon inflates.
Make a Hovercraft With a Balloon-Making a hovercraft with balloon is a very easy and enjoyable activity for kids.So let's make our own hovercraft.
Things you need- 1. A balloon
2. A CD
3. A valve type cap of sports bottle
What to do- Close the cap and stick it firmly on the hole in the center of the CD with the help of glue. Let the cap set. Keep in mind that the edges should be sealed completely. Blow up a balloon and stretch the neck of the balloon over the pop-top cap. The balloon should stand up straight. Place the hover craft on a smooth surface like a table and pop the top open. Push the hover draft and see it moving.
How does it happen- The air flow produced by the balloon creates a cushion of flowing air between the CD and the surface.This helps the Cd to lift up and reduces the friction, and because of that the CD starts hovering easily.
So these are some easy and simple science activities that kids can do easily at home or school with the help of their parents or teacher.