Low cost, high impact technology: Playpumps

The ultimate source of clean energy: children larking about. Roundabout produces water pumps that double as playground equipment. As children ride on the roundabout, they are pumping clean water into a tank.

IFC is backing the idea. The press release tells us that Roundabout...

...currently has 700 PlayPumps installed in remote communities in South Africa. The firm is now taking its proven model to Mozambique; the first Pump is in the ground with 99 more to be installed over the next year.

They also carry an HIV/AIDS awareness message.