When my 3-year-old daughter dropped the $1 battery-powered fan I bought her, the plastic case cracked, ruining it. I promised her I’d make something even better using the fan’s motor. I’m a fan of Chico Bicalho’s wonderful windup toys, so I made a robot inspired by his designs. I call mine the Vibrobot, and you can make one in a couple of hours or less.

[youtube http://www.youtube.com/watch?v=-EVrRTd5_I8?wmode=opaque&w=560&h=315]