GOTCHA GADGETS teaches children the basics of electronics while
playing tricks on family and friends. With this book kids can build
a door alarm, a motion detector, a light sensor, and a push button
sound machine. Then use them to set a snoopy sibling trap, wire the
biscuit jar, play audio limbo, confuse the cat, and more. Includes
four build-it-yourself electronic gadgets and four hilarious
sounds. Putting science and electronics in the service of
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