Fun stuff to do

Amazing Science Tricks

Editor’s Note: Make sure an adult helps you with these experiments.

Using common objects around the house, you can demonstrate cool scientific laws. Here’s how:

keepingwatersep1.jpgKeeping Water Separate

Fill two identical glasses with water. Add two tablespoons of salt to the water in one glass and stir well. Add a few drops of food coloring to the water in the other glass.

Cover the glass containing the colored water with a sheet of paper, turn it upside down and place it on top of the glass containing salt water. (Be sure to do this trick over a saucer or bowl.)

Gently pull the paper out from between the glasses. The colored water and the salt water will remain separate.


How Does It Work?

Salt water is heavier than colored water, so the two stay separate as long as the boundary between them isn’t disturbed. Try turning the two glasses over, though. The heavier salt water will now be on top, so it will flow down and mix with the colored water.

walkingcanjb2.jpgA Can That Can “Walk”

Place an empty aluminum can on its side on the floor. Blow up a balloon and tie a knot in the end. Rub a tissue back and forth on the balloon.

When you put the balloon near the can, the can will start rolling toward the balloon.

How Does It Work?

When you rub the balloon with a tissue, the balloon gets a negative electric charge of several thousand volts. When you put the balloon near the can, electrostatic induction affects the molecules in the metal. The outside of the can gets a positive charge, so it is drawn toward the balloon and starts rolling in that direction.

candlethatsuckswater1.jpgA Candle That Sucks Water

Place a candle upright in the middle of a saucer. Fill the saucer with water. Light the candle. Place a glass over the candle. When the flame goes out, the water in the saucer will get sucked into the glass.

candlethatsuckswater2.jpgHow Does It Work?

When the candle is burning inside the glass, the heat makes the air expand, so some of the air escapes outside the glass. The candle goes out after it uses up all the oxygen, so the air inside the glass cools. As it cools, the pressure inside the glass drops. Some of the carbon dioxide formed by the flame dissolves in the water as well, decreasing the pressure even more. The water outside the glass on the saucer is forced into the glass by the higher aire pressure outside.

flyingtrashbag1jb2.jpgA Flying Trash Bag

Hold the mouth of a black trash bag in one hand. Use a hair dryer to blow hot air into the bag.

Seal the mouth of the bag with tape. Tie a long piece of string around the tape so you can hold it. Take the bag out into the sun. The bag will rise slowly into the air. (It’s best to do this trick in an open area on a windless day.)

flyingtrashbagjb2.jpgHow Does It Work?

Since the bag is black, it absorbs heat from the sun. That heat makes the air inside the bag expand and become lighter. When the bag and the air inside are lighter than the surrounding air, the bag starts to rise.


Bending Light Through Water

Punch a hole in a clear plastic bottle two inches from the bottom. Put your finger over the hole, fill the bottle with water and cap it to keep it from draining out.

Darken the room and cover part of a flashlight with your fingers to make the beam narrower. When you take the cap off the bottle, the water will flow out in an arc. Shine the flashlight at the stream from the side of the bottle opposite the hole. The light will bend with the arc and create a bright glow where the water hits the sink.

bendinglight2jb2.jpgHow Does It Work?

When the light in the stream strikes the boundary between the water and air, much of the light is reflected back into the stream. The light continues this internal reflection all along the arc formed by the falling water. The same principle is used to transmit light signals through flexible optical fibers.

readingthruenv1jb2.jpgReading Through an Envelope

With a black felt-tip pen, write a three-letter word in large letters on a white piece of paper. Place the paper in a brown envelope, and insert that envelope into a white envelope. The writing on the paper should now be impossible to read.

Get a piece of dark construction paper or tear out a page from a magazine that is printed on both sides. Roll up the paper into a four-inch-long tube. When you hold the tube against the envelope, you’ll be able to read the writing inside.

readingthruenv2jb2.jpgHow Does It Work?

Usually you can’t read the writing inside an envelope because of the light reflected off the envelope’s white surface. But the tube blocks that reflected light, so you see only the light coming through the envelope.

eggthrubottle1jb2.jpgEgg Into Bottle

Find a glass bottle that has a mouth slightly smaller in diameter than an egg. Pour some hot water into the bottle (be careful!), shake it vigorously and empty the water.

Peel a soft-boiled egg and place it on the mouth of the bottle. Leave it there for a while and it will get sucked inside.

eggthrubottle2jb2.jpgHow Does It Work?

The vapor from the hot water drives the air out of the bottle. Once the egg seals the top of the bottle, the air can’t get back in. As the water vapor cools, it turns back into water, causing the pressure inside the bottle to drop. The higher pressure of the outside air pushes the egg into the bottle.


Toothpick Torpedo

Dab a little shampoo on the blunt end of a wooden toothpick.

Drop the toothpick in a pan of water. The toothpick will start moving in the direction of the sharp end.

toothpicktorpedo2jb2.jpgHow Does It Work?

Shampoo contains agents that reduce the surface tension of liquids. As the shampoo on the end of the toothpick dissolves, it reduces the water’s surface tension around it, thus releasing the water’s hold on that end of the toothpick. The water around the other end of the toothpick still has surface tension, so it pulls the toothpick in that direction.

To learn more amazing science tricks, check out the book “Amazing Science Tricks” by Michio Goto

Comments about “Amazing Science Tricks”

  1. ms.alright says:

    awesome !! ^__^

  2. jEnNi says:

    wow these are cool:]

  3. maxy max says:

    i love science and i feel like i just saw heaven !!!!!!!

  4. pearl says:

    I am using one of these and they worked awsome i love fun experaments like these

  5. avikmagic says:

    science is cool

  6. hannon says:

    wow! its really awesome. Thanks for giving an explanation it really helped me a lot. now i can use this for my science exhibit . thanks a lot.

  7. ksh says:

    ok nice!

  8. princess says:

    I love all the tricks! Amazing.

  9. neil says:

    awesome!!!!!!!!!!!!!!! :)

  10. kaminari says:

    wow amazing

  11. SheathbillZ says:

    it’s amazing!!!!!!!

  12. crome says:

    it’s Crack a’ Lakin’ baby!!!!!

  13. akash tyagi says:

    very funny );

  14. cuteboy says:

    it is nice and adorable! how fantastic!
    It makes me happy and amazed!!
    Just continue the good work! :) :D :p

  15. jaw says:

    amazing tricks …n’ these will be part of “science exhibition” of my school very soon…….

  16. katdsuu says:

    so cooool :D

  17. iPad says:

    I want to try these I love science

  18. Stranger says:

    The Toothpick Torpedo works!

  19. Kdot says:

    Wew! I can use this for school. :))
    Thank you! :)
    Please give more. =))

  20. dameil says:

    it’s really awesome!!!!

  21. arth says:

    oh! that really happens!!!!!!!!

  22. me says says:


  23. hillary says:

    it is very nice that it has an explanation …so that students like me know the reason behind the experiment… keep up giving more examples so that we students, will have more options.(give easy examples so it will be easy for us to do it at school)>>> =))

  24. hottie from idk says:

    i luv the egg thing

  25. Anonymous says:

    its soo amazing

  26. Your real name says:

    These are awesome tricks

  27. dhiz says:

    its amazing

  28. esh33 says:

    wish for more cool tricks

  29. human says:

    tnx…these help me in preparation for our contest…

  30. human says:

    tnx…these help me a lot!

  31. rrcabigquez says:

    whoa!!!!very very extraordinary tricks….it will help me a lot..tnx!

  32. llednerak.akira says:

    wow!!!!!!!!!!!!!!!it is so really amazing especially the “keeping water separate” and “reading through an envelope”. i will try all of these at home…what an excellent tricks!

  33. koretz says:

    it is so amazing tricks and easy 2 apply……

  34. tonette says:

    .woahh nice!! :D

  35. Xerxes Len R says:

    Cool and simple tricks! So nice ..

  36. jean says:

    I Love It !

  37. marvin says:

    it is nice it is nice magic science tricks but it has no end hahahahha joke AMAZING!!!^_^

  38. hello nc says:


  39. Philippines says:


  40. ev says:

    very awsome and amazing!!!!!!!!!

  41. bhong says:

    it was nice performing such amazing helps us much..thanks..

  42. cutie sofie says:

    amazing it helps a lot!! :)

  43. joe says:

    the tricks are absolutely cool:)

  44. Jiyhun says:

    Amazing!! :D

  45. shie cute! says:

    i like the egg into bottle because it is easy!!!! ;)

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