My becoming 4 year old nephew is totally fond of windmills. The old ones where the Netherlands are famous for. Since there aren't a lot of windmill toy's I decided to create one for him for his birthday. (Somehow I keep creating toy's with this printer haha). The sole purpose of a windmill is to drive something, so I wanted to create something with a mechanical movement. First I wanted to create an accurate inner working based on an original Windmill, but it became way too complex for a simple coat hanger. Tossed that Idea, and designed a simple rotation to linear motion transmission. Another great aspect of 3D printing, is that you can make it personal. I made it personal with it his name, but of course you can put anything you want on the moving platform. If you create one yourself, please share a picture :-)The mill exists out of different parts that are locked together. This way you can use a lot of fancy colors without dual extrusion. The dual color vanes are printed by pausing the print process and switching filament when the bottom half was printed. Almost every part can be printed without support, just the wheel probably needs a tiny bit of support. Merge a 3D model on the motion plate to make it personal before printing. You need to glue the base and the ground plate together (on its back on a flat plate, don't forget to add the motion plate first). The rest can be screwed together using 4 M4 bolds, one m4 washer and 3 self-locking bolds. Or, glue everything together if you don't have m4 bolds. You have to customize the Motion plate with your own design, name or whatever to make it personal. I've added besides the stl a .obj, .dxf and a .3ds of that part.