Yo-Yo Mouse
We've seen plenty of round mice, including Apple's infamous puck, and many devices that derive power from a yo-yo-like pull string mechanism. So we're not quite sure why we've never seen those two concepts married before. In retrospect, a wireless mouse charged by the kinetic energy of using it as a yo-yo seems like a painfully obvious idea. As an added bonus, this tiny pointer with an LCD battery gauge makes you get up every so often and get your limbs moving -- thus saving you from chromic back pain. Huzzah! Of course, there's no guarantee you'll ever actually see one of these on shelves. Check out the source for a few more pics.

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Yo-Yo wireless mouse concept charges with the flick of a wrist, saves your back