Windmill coat hanger with mechanics

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 sim