Yo-Yo for iPhones and iPods
What if you could play the yo-yo and use all the energy that you put into playing straight in your iPhone or iPod? Swedish designer Peter Thuvander created a yo-yo just like that.
The yo-yo is in fact an induction charger that has an onboard battery that gets charged while playing. Once the battery is charged with the motion from playing the yo-yo, you plug the device to your iPhone or iPod and it will charge it. Very clever!