This is an example of the play pump. The play pump is a device used to get fresh clean water from hundreds of meters deep in the ground. Before the play pumps were created they had to use dirty infected water because they didn't have any places to get the clean water. This system costs about $7000 each but provides safe water for Africans. These are one of the special things in south Africa. It also keeps the kids healthy and active. The play pump works because when the kids spin the huge wheel, the water gets pushed through the piping and goes into a pipe where you collect your clean and healthy water.

Link to Play Pump Video:

http://video.nationalgeographic.com/video/player/kids/green-kids/playpumps-kids.html