I have written about Project H from Inhabitat before, with the Hippo water roller. Here is yet another wonderful design concept I found on the Inhabitat site.
Combine a potable water system with the unlimited energy of children at play, and you’ve got yourself a recipe for success. Playpumps International is a non-profit that has designed and successfully implemented more than 900 Playpump systems in South Africa, Mozambique, Swaziland and Zambia benefiting approximately two million people. The system is simple, using the movement of children at play to pump water from underground, up to a tower (which doubles as a billboard for public health announcements), and down to a publicly-available faucet.
I have problems with the annoying music, the billboards and more . . . but perfect solutions are not what thrill me right now. I am just happy solutions are being offered for the problems around the globe. This one is fun.