WindBots: 6-in-1 Wind-Powered Machine Kit
The power of wind makes them go - and you'll have fun building 6 awesome bots that move without any batteries at all. Easy, snap-together assembly needs no glue, either. Yacht, big-wheel trike, drilling monster, quadruped, soaring machine and walking robot can all be set in motion with the included hand-powered wind generator. Full color manual shows how its done.
From Thames & Kosmos, for ages 8-12 yrs.