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The Doppler effect causes the “neeeeeoowwm” sound of cars.
A balloon acts as a lens to focus sound.
Build a cuíca—a musical instrument—and play with vibrations.
This simple toy sounds like a swarm of bees.
Send waves down a spring to watch them travel and interact.
Two lips make sound.
Use your voice to transform laser light into dazzling patterns.
Make a speaker that turns changing electric current into sound.
Tune in to tunes with your teeth.
Listen to a beam of light.
Hear the magnet!
Make a record player with a pencil, pin, and paper.
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