A company in South Africa has developed a pump which uses the energy of children playing to pump water from a well and solve the chronic water shortages which plague rural African villages.
A pump is attached to a roundabout which pumps water from a well when the children play.
I love it when lateral thinking gets used to solve problems - just like the wind-up radio.
My brother lives not far from a wind farm, which is another great way to generate power without consuming fossil fuels.
What I don't understand though is why people don't use water wheels in rivers to generate power