Earth in the palm of your hands. Mess with Earth till it looks exactly the same as before. :-)
Based on Emmetts screwless Heartgear:
http://www.thingiverse.com/thing:12208
and the textured earth by bld:
http://www.thingiverse.com/thing:17336
Takes one revolution till it is back to normal. Size is 140mm in diameter.
Good luck with the assembly, it's quite tricky. ;-)
Earthgears.scad | 5.0KB | |
Earthgears.stl | 24.1MB | |
EarthgearsAssemblyHelp.stl | 24.9MB | |
EarthgearsCenterPinpeg.stl | 574.8KB | |
heart.stl | 5.9MB |