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Build a motorized robot, race car, and countdown timer — all that run without any batteries or electrical power! The secret behind these fascinatin...

Build a series of wacky, motorized robots with this introductory mechanical engineering kit for kids ages five and up. A beautifully illustrated 32...

Set the world aglow with peace, happiness, and good times! Make yummy candies that actually glow in the dark. Mold fun, glowing gummies and sweet, ...