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Contents Turn Simple Stuff into Cool Contraptions About Building Things Project 1 Rocket-Propelled Toy Car ¿ Power up a speedway demon 00 Project 2 Gravity Man! ¿ Balancing on the high wire 00 Project 3 Heartbeat Monitor ¿ Make a working stethoscope 00 Project 4 Constellation Maker ¿ See the night sky from your bed 00 Project 5 See-Safe Solar Viewer ¿ Watch eclipses, sun spots, solar flares! 00 Project 6 Automatic Cat/Dog Feeder ¿ Let your pet feed itself 00 Project 7 Auto-Fill Water Dish ¿ Pets, like people, need water too 00 Project 8 Giant-Pumpkin Grower ¿ Grow pumpkins bigger than you are! 00 Project 9 Snowball Launcher ¿ Throw farther and save your arm 00 Project 10 Super-duper Water Shooter ¿ All ready for summertime fun 00 Project 11 Drinking-Straw Dispenser ¿ Quick! Grab one for that tall, cooling drink 00 Project 12 Hidden Compartment Display Case ¿ Show off stuff, and hide other stuff 00 Project 13 Solar-Powered Pocket Watch ¿ Batteries not needed 00 It's Electrifying! Project 14 Mobile Thunderstorm Detector ¿ Put an AM radio to work 00 Project 15 Sidewinder Thingamajig ¿ Check remote controls . . . and play tricks 00 Project 16 Magical Electricity Sensor ¿ Electromagnets and more . . . 00 Project 17 Morse Code Telegraph ¿ Dots and dashes for secret messages 00 Project 18 Secret Drawer Lock ¿ A safe place for your secret stuff 00 Project 19 Build-It Robot ¿ You¿re in control 00 Project 20 Brain-Powered Robot The making of a Moth-Bot! 00 Index 00
Library of Congress Subject Headings for this publication:
Handicraft -- Juvenile literature.