Thames & Kosmos WindBots: 6-in-1 Wind-Powered Machine Kit

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Harness the wind to power 6 awesome bots that move without any batteries or electricity.
 
Students will have all the materials and instructions they need to build a big-wheel tricycle, quadruped, soaring machine, drilling monster, walking robot, and wind-powered yacht. Pieces snap together easily no glue needed.
 
To make each bot go, they'll also build a handheld wind generator. With the turn of a crank, the fan will set their creations in motion.
 
As students assemble and experiment, they'll learn about how gears transmit power and torque, and how wind is a power-generating technology past, present, and future.
 
This kit includes 133 pieces and a 52-page guide. No batteries or electricity required.