My sister sent me this case study on a new(ish), and incredibly simple technology, that was devised in South Africa in the late 90s when some engineers found a way to pump clean water reserves using roundabouts (merry-go-rounds) that kids play on as the engines. So play time = clean water.
Genius!
+ Article on Roundabout Outdoor Play Pump
+ Play Pumps Official Site - Includes information on helping to sponsor play pumps where they are most needed
+National Geographic Kids - play pump news story and video
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