KLUTZ LEGO Gear Bots
62 LEGO elements including axles, kinetics, and cranks, in this part craft/part builder set! Build 8 physics-driven bot creatures, using LEGO Technic bricks, papercraft, and many engineering principles. It comes with a 64-page book that's full of exciting building ideas and information about gear parts. You supply the enthusiasm!
From KLUTZ, for ages 8 yrs-teen.