Astromedia, a German-based company that specializes in papercutcrafts and toys, has created a papercut engine that runs on the heatfrom a cup of coffee. Or from the chill of packed ice; the Stirlingengine isn't picky.
It's pretty cool, and works by having heated air push a piston backand forth, creating a wonderful little whirling engine. The Stirlingengine is made from than punched cardboard and various other parts. Itdoesn't actually run anything, per se (just sort of turns), but it's afun toy for children of any age.
It can run for hours (one person even managed over 12 hours!) and isavailable online for -21.90 (about 29$ US). No word about shipping oranything, but one must take into account that they are in Germany.Perhaps someone could homebrew one?
Source: astromedia.deAdded: 11 September 2007