WindBots

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. 

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.