Empower Playgrounds

A team at Brigham Young University is working on playground equipment that translates the motion of play into electricity.

"The students’ prototype merry-go-round uses a direct current generator system to turn the rambunctious energy of kids into electricity that can light schoolhouses in places like rural Ghana. Six engineering students labored on the project for two semesters to develop a device complicated enough to capture and translate human energy into electricity, but simple enough to incorporate old car parts. "

official 'Empower Playgrounds' website (not much info there yet)