Spring Bots st-diecast This high-quality refractor telescope with

This high-quality refractor telescope with glass optics allows for countless exciting space observations

achieving good results

and the robots in popular space-related science fiction

supersonic jet

Spring Bots st-diecast This high-quality refractor telescope withThames & 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