Explore the workings of gear trains, linkages, and intermittent gears as you discover how these elements work together to create complex walking devices. Each model moves in a different way. For example, the four-legged terrain-walker bot keeps its body level as it moves step by step, while the kangaroo-bot hops forward on two legs. The leopard-bot has four long legs while the wild boar has four short legs. The fairy shrimp model wiggles along on swimmerets while the monkey model uses its arms to crawl along a string.Details:Get hands-on with physics and engineeringConstruct 8 awesome walking machinesFor ages 6 and upContents:134 pieces8 models44-page full-color manual