Spring Bots web Kit features snap-together construction and

Kit features snap-together construction and rolling wheels

The top speed was 870 km/h at 6

meter are all ready in the back of the Ectomobile for your next call

Includes display stand

Interchangeable Material (for Armchair) x4

Spring Bots web Kit features snap-together construction andThames & Kosmos Build 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