If you’ve got a toddler running about the house you may have asked yourself “Isn’t there some way I could put all of that energy to good use?” Well the folks who came up with Rocco, one of the awesome entries in the Greener Gadgets design competition, were thinking the same exact thing. When kids rock on Rocco, the kinetic energy is converted into electricity that lights up Rocco’s ears which detach and can be used as nightlights, flashlights or a lamp!