There was the post on the MAKE: Blog, er, ten days ago, which means it's old news, but it's still pretty darned cool.
You remember those merry-go-round thingies in the playground or park when you were a kid? You put your sibling on there, tell 'em to hold on for dear life, then try your hardest to make them puke? Ok, maybe that was just me.
Anyway, think of all the free energy generated by sibling rivalry that's just being wasted! When there are thirsty kids in Africa! "Wait," says PlayPumps International. "Maybe we can use that..."
Via the MAKE: Blog.
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