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 fullcolor manual guides you in assembling six models one at a time from over 130 pieces. Build a bigwheel tricycle quadruped soaring machine drilling monster walking robot and even a windpowered yacht. To make them all go the kit also includes the pieces to build a handpowered wind generator. As you build and experiment you will learn about how gears transmit power and torque. Also learn about wind as a powergenerating technology — past present and future. Easy snaptogether assembly requires no glue Stepbystep illustrated instructions 6in1 engineering kit: build six windpowered models and a handheld wind generator. Start cranking the generator and watch them go! Learn about gear ratios and windpower technology. No batteries or electricity required
