Imagine if playing a game could not only burn calories but create energy? This is sort of the idea behind the Soccket Energy-Harnessing Soccer Ball, which is made of a durable, deflation-proof, water-proof EVA foam that also houses an internal engine that can harness the kinetic energy from movement and store it on a battery. From a little bit of kicking around it can reportedly be used to power an LED lamp for more than three days.
 httpv://youtu.be/Bi8-wLWqJp8