Build 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 130 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-powered wind generator. As you build and experiment, you will learn about how gears transmit power and torque. Also learn about wind as a power-generating technology — past, present, and future. Build 6 wind-powered models and a handheld wind generator to explore one of the oldest power sources in the world: wind! Models include a Surf Bot, Walker Bot, Drill Dozer, Quadruped, Flying Machine, and Big Wheel Tricycle. Pieces snap together easily and require no glue. A 52-page, full-color manual includes step-by-step illustrated assembly instructions and information about wind technology, gear ratios, and how gears trasmit power and torque. No batteries or electricity required!
