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Amazing Science Tricks with Common Household Items


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

Keeping Water Separate

keepingwatersep1.jpgFill 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.


keepingwatersep2.jpgHow 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.

A Can That Can “Walk”

walkingcanjb2.jpgPlace 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.

A Candle That Sucks Water

candlethatsuckswater1.jpgPlace 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.

A Flying Trash Bag

flyingtrashbag1jb2.jpgHold 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

bendinglight1jb2.jpgPunch 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.

Reading Through an Envelope

readingthruenv1jb2.jpgWith 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.

Egg Into Bottle

eggthrubottle1jb2.jpgFind 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

toothpicktorpedo1jb2.jpgDab 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

56 Comments on Amazing Science Tricks with Common Household Items

  1. Very very helpful
    Thanks a lo!!!!!!t

  2. Love em the toothpick torpedo was great and the can tjat can walk e xceplent really love ur website add more experiments

  3. All tricks was amazing they were sensible

  4. ya this is wow. as a speaker of the science club this is wisdom to thee

  5. all these science tricks are best for kids, to understand general science concept.


  7. Awesum

  8. cool !!!

  9. It’s really interesting and fun to do!

  10. Cool.nice tricks.i could really use it for our science month.

  11. Nice

  12. Nice experiment

  13. Is there anyone who tried keeping water separate and didn’t work?

  14. Wasl Iqbal // July 28, 2015 at 1:59 am // Reply

    it is awesome. very nice


  16. Paddu miya // June 29, 2015 at 8:56 am // Reply

    I have done all the tricks to empress my friends and they work well…..

    It is awesome

  17. I did the egg into bottle trick before works great

  18. awesome

  19. Sweet! Nice party tricks!

  20. Cool Projects.

  21. use to do boy scouts // May 28, 2015 at 11:03 am // Reply


  22. Helloperson // May 25, 2015 at 4:11 am // Reply

    These tricks are so cool and awesome

  23. Spider Ninja // May 7, 2015 at 3:52 pm // Reply


  24. the tricks above are simple but sensible…i like them.. 🙂

  25. ayatosakamaki // February 27, 2015 at 11:16 pm // Reply

    i like those experiments

  26. It’s really amazing.Excellent science tricks

  27. mr.intelligent // December 18, 2014 at 10:34 am // Reply

    these are simple and interesting.

  28. good but not too much

  29. good article amazing!

  30. Great experiments! The only one I have a problem with is the egg one. DO YOU KNOW HOW HARD IT IS TO MAKE A SOFT BOILED EGG?!?

  31. I like it. 🙂 so easy to do and the materials are easy to find. Thanks for the science tricks!!

  32. Amefurashi Tsundere chan // August 16, 2014 at 5:40 am // Reply

    Sugoi!! Fantastic tricks ^u^ ne~ can you add more? I like those

  33. Its avery fantastic tricks

  34. if you fill a bowl of water then shake some pepper on top then put shampoo on your finger and put your finger in the water the pepper will “run” away from your finger

  35. Cool

  36. rajinikanth // April 30, 2014 at 10:59 am // Reply

    Unknown tricks so I like it

  37. those are real good tricks yo.

    The bro

  38. Cool tricks. Love it! 😀

  39. Happy de austin singh // March 26, 2014 at 6:50 am // Reply

    It’s really fantastic tricks.i like it.

  40. I like this this tricks and expeiments. I enjoy doing this tricks and experiment

  41. very nice and very simple

  42. I like it bro.

  43. These are the experiments that can change our life . Try and focus.

  44. These tricks are enjoyable & for doing something in life.

  45. these tricks is really fantastic i like these tricks

  46. Tha best tricks eva…I nva knew you could use everyday things to make magic…

  47. Chriss ChaneLLie // November 25, 2013 at 6:25 am // Reply

    I like those experiments, I’ve been able to do those experiments in our science project 🙂

  48. coupling stock // November 18, 2013 at 10:48 pm // Reply

    When the candle is burning inside the glass, the heat makes the air expand, so some of the air escapes outside the glass.

  49. in an bond paper type your name and give it to your partner and your partner will close her/his eyes and feel what name is in the bondpaper

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