Geared up gadgets

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Build five fun gadgets and learn about gears and transmissions. Create a helicopter model with a rotor that spins using a rubber band-powered motor. Assemble a spinner toy that you wind up to launch a fast-spinning top. Make a centripetal force machine that flings its arms outward at high speeds. Build a hand-mixer that demonstrates a gear train. Construct a cool aircraft launcher that flings a model vehicle across the room on a zipline. A 24-page manual guides your model building and experiments with step-by-step illustrated instructions. Ages: 6+Experiments: 5Piece Count: 114Manual Pages: 24Product Dimensions: 8.75 x 11 x 2.5 in. Show more