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In this activity, learners explore how musical instruments are engineered.

Learners design and create musical instruments from common objects; their challenge is to create an instrument that can make three different tones.

In this design challenge activity, learners build a four-stringed instrument that can play a tune.

In this activity, learners explore how an electromagnet works by making a simple one. Using this knowledge, learners design a diagram to make a working speaker using household materials.

In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear.