Angelo Casimiro is only 15, but he just invented electricity-generating footwear -- as you walk or run about, your shoes will generate power that can be used to charge your phone or any small battery-powered device.
The footwear was Casimiro's entry to Google's Science Fair this year.
"Electricity is generated using a an insole generator that is made out of two pairs of piezoe-electric discs, which produce energy when the crystal bend inward,"explains Casimiro in his entry video. The generator is soldered to the battery of a power bank, which can then be used to plug in any device through a USB connection.
Don't expect to charge up your iPhone on your morning jog. In initial tests, Casimiro's device was able to charge a phone for about 10 minutes of use after playing 2 hours of basketball. But hey, it's a start.