• Includes 5 models with the theme of “gears”.
• Models use gears and/or rubber bands to move.
• New Propeller design.
• Realistic outer shell designs make the models come alive!

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 32-page manual guides your model building and experiments with step-by-step illustrated instructions.