Students kick around a soccer ball during a break at school. Minutes later, that same ball provides light for their classwork. After it is kicked around for only 30 minutes, the SOCCKET can store enough energy to power a lamp for several hours. The ball was developed by five students from Harvard University in 2010. The SOCCKET looks exactly like a normal soccer ball, but inside it there is a power-generating device to produce electricity by movement. The ball is also good for health because it encourages exercise and offers a better way to light rooms instead of smoky oil-filled lamps. Two of the five students who invented the ball have founded Uncharted Play, a kind of social enterprise. A SOCCKET ball costs $99, but Uncharted Play uses its profits to donate the balls to the children in the developing world. It became popular after Barack Obama played with one when he visited Tanzania in 2013.