Almost as interesting, this video of a Stirling/Heat engine using just an empty can, sticks and heat for power source: https://www.youtube.com/watch?v=FCjYZT6F

Almost as interesting, this video of a Stirling/Heat engine using just an empty can, sticks and heat for power source: https://www.youtube.com/watch?v=FCjYZT6FJm4 https://www.youtube.com/watch?v=FCjYZT6FJm4 And a very simple motor using just only a battery and wire: http://www.youtube.com/watch?v=vCSvNyHorgo http://www.youtube.com/watch?v=vCSvNyHorgo