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SPECIAL COLLECTIONS

After-School Snacks

These Snacks are a healthy, filling way to satisfy your late-afternoon hunger for science. Try building them with friends!

Science activity demonstrating color afterimage phenomenon
Bird in a Cage

Stare at one color—but see another.

Science activity that demonstrates perception of camouflage and movement
Disappearing Act

If you want to stay hidden, you'd better stay still.

Science and engineering activity to make a record player
Groovy Sounds

Make a record player with a pencil, pin, and paper.

Science activity that demonstrates electrostatics
Remote-Control Roller

Wield electrons and protons to roll cans.

Science activity that produces musical sounds only you can hear
Secret Bells

Create a sound system for music only you can hear.

Science activity investigating electromagnetics and motors
Stripped-Down Motor

Make a simple mini-motor.

Science activity to create an instrument that produces sound from a vibrating stretched membrane
Water-Bottle Membranophone

This surprising instrument is fun to make—and even more fun to play.

Science activity that demonstrates persistence of vision
Whirling Watcher

Short bursts of moving images produce some interesting effects.