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 :-)