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Cup Speaker
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Make your own speaker with a magnet, wire, and paper cup! If you have a radio with a headphone plug and an old pair of headphones, this is a great tinkering activity.
Build a Band
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In this design challenge activity, learners build a four-stringed instrument that can play a tune.
Headphone Helper
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In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear.