Thames and Kosmos Geared-Up Gadgets BOGO20 which inspires the creation of

which inspires the creation of an electric bubble-blowing machine with a propeller

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Thames and Kosmos Geared-Up Gadgets BOGO20 which inspires the creation ofBuild 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 28 page