Thames & Kosmos Geared-Up Gadgets

5-in-1 models!  Build five fun gadgets and learn about gears and transmissions with this Geared Up Gadgets set.  You can 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 or build a hand mixer.  Construct a cool aircraft launcher that flings a model vehicle across the room on a zipline.  Includes a 24-page manual.  114 pieces.

Ages 6 and up.