Strandbeest
How to calculate the RPM of the windmill.
Print an assembled strandbeest:
http://www.instructables.com/id/3D-Printed-Theo-Jansen-Strandbeest/
This company prints 3D objects from your files:
http://www.shapeways.com/
Printing a strandbeest fully assembled:
http://www.shapeways.com/shops/theojansen
Strandbeast Hompage:
http://strandbeest.com