How do phones work? How can your cousin in far-off Kauai sound like she's right next door? How is your voice carried through all those wires? You'll learn the answer to these questions and more when you build your very own telephone. This kit includes everything you need: a capacitor, a microphone, a circuit board -- even a piezo transducer. Plug your phone in and use it to invite a friend over for pizza!
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The second book in this popular series celebrating friendship, magic and fighting for what you believe in.
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