I first caught a glimpse of this crazy machine in an ad for an electricity company a few years ago (even blogged about the ad here). I didn't know what the machine was then but have since come across it a few times - the solar powered Do-Nothing Machine, created by none other than Ray and Charles Eames.
Charles Eames apparently stated, "It is not supposed to do. It is supposed to be. Its whole function is in its being."