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Demonstrate diffraction using a candle and two pencils.
Gelatin can do much more than just wiggle and jiggle.
Make waves without getting wet.
Light plus light equals dark.
You can make glass objects disappear.
Two cylinders that look the same may roll downhill at different rates.
Use electrostatic repulsion to suspend tinsel in the air.
Create and examine an ice balloon.
Who needs expensive optical equipment to see better?
Keep an eye on your retinal blood supply network.
Why do we see colors in soap bubbles?
Use magnets to model the motion of electrons.
You’ll feel the pressure to do some heavy lifting.
Measure the efficiency of solar cells.
Magnetic lines stop here.
This simple toy sounds like a swarm of bees.
Build a cuíca—a musical instrument—and play with vibrations.
See how differently shaped ears affect your hearing.
A pendulum moving in two directions creates beautiful designs.
Listen to the sound of rain falling—anytime, anywhere.
Hold a seashell to your ear to hear a steady roar.
Listen to the radio in an unconventional way.
Gravity turns soap film into an ever-shifting, colorful masterpiece.
Make beautiful music with sticks, straws, and rubber bands.
Two lips make sound.
This surprising instrument is fun to make—and even more fun to play.
Suspend an object in the air by blowing down on it.
Send waves down a spring to watch them travel and interact.
Boundaries are the gift that keeps on sifting.
Without depth perception, random lines can become a chair!
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