Description:

• Build 10 fun motorized models of out-of-this-world machines!
• Models include a creepy slithering Alien snake-bot that crawls on six legs, A roving dyno-bot with reciprocating arm, a hopping Alien frog-bot, and many more.
• Comes with a 40-page, full-color experiment manual with step-by-step assembly instructions and scientific explanations.
• Battery-powered motor box brings your models to life with slithering, crawling, swinging, rolling, hopping actions!
• Learn about the physics of levers and linkages!
• A parents' Choice Recommended award winner