A Yo-Yo Powered MP3 Player

This is perhaps the most inventive human-powered device that's come across my desk this month. It's a design concept for a wireless yo-yo powered MP3 player. The inventors estimate that between 10-12 tosses per hour are sufficient for continuous music play. A wireless headset allows the user to listen to music while yo-yoing. Chris Aimone and Tomek Bartczak created the design, and recently took home the Pop Sci and Core77 award for best human-powered device. :: Via: EcoGeek