Springbots: 3-in-1 Spring-powered Machines tgtgho17pg16 the 32-page

the 32-page

uniquely weighted pieces with stacking base are gratifying to hold

Heavy-duty bi-fold gameboard with original artwork

this sweet little guy is 16" of snuggles

while tread tyres round off the picture

Springbots: 3-in-1 Spring-powered Machines tgtgho17pg16 the 32-pageBuild a motorized robot, race car, and countdown timer, all that run without any batteries or electrical power! The secret behind these fascinating machines is a power source called a mainspring, a spiral shaped spring that stores up energy when wound up by hand, and then converts that stored energy back into motion when it discharges. The mainspring inside the robot turns gears which enable it to march forward on two legs. The race car zooms across