Playground as Power Generator: Daniel Sheridan's See-Saw

After working as a volunteer in Kenya last summer, Daniel Sheridan, a Coventry University student in Consumer Product Design came up with the idea of the playground as power generator.

To be precise, as a last year project he designed a See-Saw that when put in motion by kids on the playground generates power for the school.

In See-saw to power African schools Hanna Goff (BBC) gives us more specific details on how the power generation works and tells us that according to Daniel's estimates "five to 10 minutes use on the see-saw could generate enough electricity to light a classroom for an evening".

This makes sense in countries with poor electrical service.
Call it sweat equity.

Do you know of any other simple, practical, ingenious ideas?

Thanks to Springwise for bringing it to my attention.

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