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Windbots: 6-in-1 Wind Powered Machine Kit sale The rocket scientist backpack sportsBuild six awesome bots that move without any batteries or electricity. The secret behind these fascinating machines is one of the oldest power sources in the world: wind! A full color manual guides you in assembling six models one at a time from over 200 pieces. Build a big wheel tricycle, quadruped, soaring machine, drilling monster, walking robot, and even a wind powered yacht. To make them all go, the kit also includes the pieces to build a hand