7 Electric Circuits

Making a Flashlight, Magic Wand, and Steadiness Circuit

Tinkering with electricity is especially exciting because you can’t see it, yet you know that it can flow through wires as well as the tissues of your very own body. Raymond F. Yates’ 1942 classic, A Boy and a Battery, missed the mark by about 50 percent; it turns out kids love making lights light and buzzers buzz no matter what gender they are!

As I’m sure Edison would attest, were he with us today, making a lightbulb glow ranks among one of the deepest primordial sources of satisfaction. Perhaps the first people to make fire—and there were undoubtedly many firsts—experienced ...

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