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6 Weird Science Experiments

With just a few items nearly everyone can find at home, you can do amazing science experiments. Want to make a lava lamp? Just grab a little cooking oil, water and salt. How about writing with secret “ink” on a mirror? All it takes is dishwashing detergent, water and a cotton swab. Get set for fun and learn a little science?


Note: Be sure to ask for a parent’s help and permission before starting any experiment.


Make spaghetti do tricks with this fun and fizzy experiment.

What You Need:

  • uncooked spaghetti
  • 1 cup of water
  • 2 teaspoons of baking soda
  • 5 teaspoons of vinegar
  • tall clear glass

What You Do:

Put water and baking soda in the glass. Stir until the baking soda is dissolved. Break spaghetti into 1-inch pieces. Put about 6 pieces in the glass. They will sink to the bottom. Add vinegar to the mixture in the glass. Observe what happens to the pieces of spaghetti. Add more vinegar as the action starts to slow down.

What’s Going On:

When baking soda and vinegar are mixed together, a chemical reaction occurs. It produces a gas called carbon dioxide, which forms lots of bubbles on top of the mixture and smaller bubbles at the bottom of the glass. These little bubbles stick to the spaghetti and make it float to the surface, just as you do when you sit on a swimming pool noodle! When the spaghetti reaches the surface, the bubbles pop and the spaghetti sinks to the bottom.


Write an invisible message on a mirror using a soapy solution and a cotton swab. The secret message will appear only in a foggy room.

What You Need:

  • liquid dishwashing detergent
  • cup of water
  • a few cotton swabs
  • hand mirror or bathroom mirror

What You Do:

Place a few drops of dishwashing detergent into the cup of water. stir to mix well. This is your secret message “ink”.

Dip a cotton swab into the soapy solution. Write a short message on the mirror. When the liquid dries, the message will be invisible. (If not, use a little less of the solution.)

When you take a hot shower or bath, do not get the mirror wet, but get the mirror close enough to the steam from the water so that it gets fogged up. Close the door so the steam stays in the bathroom.

Observe what happens. Can you read the message?

More fun: Write a message and wait until someone else takes a shower or bath. See how quickly they discover your secret.

What’s Going On :

The steam on the mirror is made up of water molecules. These tiny drops of water stick together on the mirror because of a force called surface tension. The liquid dishwashing detergent breaks the surface tension of the water. Wherever there is detergent, the water molecules are unable to form into droplets. The words written with the soapy solution stand out clearly against the foggy background of the mirror.


Why do people put covers on their outside faucets in the winter? Why isn’t it a good idea to leave water in a garden hose during freezing temperatures? It’s the power of ice.

What You Need:

  • three small plastic drinking cups, one with a lid dish or pan big enough to hold all three
  • cups
  • water
  • freezer

What You’ll Do:

Fill all three cups with as much water as possible without overflowing. Put the lid on one.

Set all three cups on the dish and place in the freezer overnight.

Check to see what happened the next morning. Did the water stay the same size after it became ice?

Leave the frozen items in the freezer for a few days. Did you notice any changes?

What’s Going On:

When water freezes, it expands. When water is left in a garden hose during freezing temperatures, the force of the ice expanding can cause the hose to break open. The same thing can happen with the water pipes in your house. If the water freezes in the pipe, it can break the pipe open.


Fool your eyes with this experiment. Using a homemade thaumatrope (THAW-muh-troap), you can combine two pictures into a single image by quickly flipping the pictures back and forth.

 What You Need:

  • small piece of cardboard, about 2 inches by 3 inches
  • sharpened pencil or pen to make holes in cardboard
  • two pieces of string tape
  • two small pieces of paper

What You Do:

Cut out a small piece of cardboard and punch holes in each corner. On both sides, write a small “X” in the center of the cardboard.

Cut out two pieces of white paper that are a little smaller than the cardboard piece. Make sure the holes will not be covered up when the paper is placed over the cardboard.

On one piece of paper, draw a fish. On the other, draw a fishbowl. Be sure to draw the fishbowl larger than the fish.

Tape the picture of the fish on one side of the cardboard, so that the fish is directly over the “X”.

Tape the fishbowl on the other making sure the bowl is centered on the “X”.

Thread one piece of string through the two holes on one side. Thread the other piece of string through the two holes on the other side.

Twist the strings together on each side. Pull the strings as though you are trying to stretch a rubber band. This will make the cardboard twirl. Watch the pictures. Does it look like your fish is in the fishbowl?

More fun: Draw a picture of a bird and a birdcage or anything else you can imagine!

What’s Going On:

Your eye sees the image of the fish for a short time after it is gone. By that time, the picture of the fishbowl is in sight, and you seem to see both pictures at once. The same thing happens at the movies. If you look at a piece of movie film, you’ll see that it is a series of pictures separated by black spaces. These pictures with black spaces in between are flashed on the screen so fast that your eye cannot see the individual pictures or the black spaces.


Here’s an easy yet amazing way to make your own “lava lamp’.

What You Need:

  • cooking oil, such as vegetable oil
  • cold water (no ice)
  • salt water glass
  • food coloring

What You Do:

Fill the glass about three-quarters full of cold water. Stir in a few drops of food coloring. Can you guess what will happen when you add oil to the water? Will they mix together or separate? Which will be on top?

Add some cooking oil until you have about a half-inch layer of oil on top of the water. Wait until the oil and water have separated into two layers before the next step.

Sprinkle salt on top of the oil. Keep adding salt to see what happens.

What’s Going On:

The oil is lighter than water, so it floats. The salt is heavier than both the oil and the water, so it sinks. As the salt passes through the oil layer, it picks up blobs of oil, which cling to the grains of salt temporarily and sink to the bottom of the glass. Then the oil breaks free from the salt and floats to the top.


See how many paper clips it takes to make a full glass of water overflow.

What You Need:

  • clear plastic cup
  • 100 small metal paper clips

What You Do:

Fill the cup to the top with water.

Guess how many paper clips it will take to make the water overflow. Write down your guess.

Carefully drop one paper clip at a time into the cup. Count how many it takes to make the water overflow. Was your guess close?

Look at the cup from the side. The water is bulging upward like a balloon!

More fun: Fill the sink or a dish with water. Carefully lay a small piece of paper on top of the water. See how many paper clips you can put on top of the paper before it sinks. Try using different sizes of paper.

What’s Going On:

Drops of water stick to each other. That is why the surface of the water bulged when you added the paper clips. Scientists call this surface tension. The surface tension of the water is what held up the floating paper until the weight of the paper clips became too heavy.

50 Comments on 6 Weird Science Experiments

  1. spirit101 // May 26, 2009 at 4:50 pm // Reply

    I think they need more experiments.

  2. this is awsome yo!

  3. scoutsislife // May 26, 2009 at 3:42 pm // Reply

    this is coool i never thought you coudl do that with the salt but it totaly makes since that would be so cool to do with my moms day care. also the fish bowl is cool and it is more because your brain can’t process the pictures that fast so you see them both together.

  4. swimming spagetti was horrorable! it stinks!

  5. amazing!

  6. sweet

  7. the lava lamp was cool at first but it stoped after the bubble went down then came back

  8. 1390 troop leader // May 21, 2009 at 1:25 pm // Reply

    i’m going to do the ice 1 and lava lamp

  9. I did the lava lamp it was cool,but it only lasted for about an hour.

  10. Man i liked the Lava lamp

  11. i am going to try lava lamp

  12. joe king // May 5, 2009 at 3:16 pm // Reply

    i liked the float spag

  13. cool dude // May 4, 2009 at 4:29 pm // Reply

    I’m so gona try the lava lamp one for my science project.

  14. brookey!! // May 2, 2009 at 10:27 pm // Reply

    heyy has anyone done the paper clips one

  15. I tried the Ice experiment with a glass cup and lets just say my mom thought i blew-up the freezer! =( glass was ALL OVER!!!!! OOOPPPS!!!!!

  16. hockeyplayah // April 27, 2009 at 3:23 pm // Reply

    Sweet! I’m going to try it!


  18. Kenny876543 // April 23, 2009 at 11:16 am // Reply

    my lava lamp exploded how did that happen?

  19. COOL experiments im doin them all

  20. the lava lamp is the coolest!!!!

  21. swimming spaghetti is weirderer!

  22. The lava lamp was SO COOL!

  23. nice experiments

  24. yur website is kool i like the lava lamp

  25. radsurferman150869 // March 25, 2009 at 6:21 pm // Reply

    Dude, u like, gotta try the lava lamp thing. It’s bogus dude.

  26. The secret message is so cool. I scared my little brother Joshua with it. It was hilarious. LOL!

  27. Lava Lamp is cool

  28. awsome

  29. I like the secert message i tried it and my sister said that she could read what I said.I said that It was my birthday today on march 24

  30. I like the lava lamp idea the best.

  31. This is cool

  32. I think the swimming spaghetti was off the hook

  33. I love the experiments!!!!!

  34. 123zoolane // March 18, 2009 at 1:22 pm // Reply

    I think you should add more experiments to your website!! They’re really good!!!!

  35. i did the secret message on a mirror i told my mom she got mad because she said it was soap scum

  36. water lily // March 9, 2009 at 8:16 am // Reply

    love them!! they will really help me at my projects!

  37. paramore~fan // March 8, 2009 at 6:45 am // Reply


  38. A few notes on the lava lamp: Don’t put to much salt in the same place, as if you do, the blobs of oil will be too big. Instead, try to spread it out in the glass. Also, Don’t put much food coloring in the glass, or the water will be too dark

  39. i wanna try the spaghetti one but what are we supposed to find out?

  40. friend in school made it we were all amazed

  41. I tried the lava lamp one it was pretty cool, but you keep having to add lots of salt.

  42. i am going to do the lava lamp one!!!

  43. swimming spaghetti does not proove anything

  44. so totally awesome mate

  45. startreck101 // January 29, 2009 at 9:26 am // Reply

    i’m going to do swimming spagetti for my science fair project

  46. they were all like amazing

  47. i love the one to make spaghetti float!!!! its awsome i used it on school and they loved it!!!!!! make more experiments!!! please!!!

  48. Why not add some more experiments.

  49. I am going to build the lava lamp and put it by my bed.

  50. gangsta man21 // January 13, 2009 at 6:27 pm // Reply

    sup yo gonna try a lava lamp fo school project

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