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

Learners build a simple electromagnet, then use this electromagnet to transform a yogurt container into a working speaker. They can connect their speaker to a radio and listen as it transmits sound.

In this activity (pages 42-49), learners discover the methods and challenges of building nanoscale structures with macroscale equipment.

In this activity, learners build their own sound machines and explore the interplay of motion and sound.