check out 'steam boy' by Miyazki's protege, the animation took him ten years to complete, forgot his name, you'll find the wheel machanic, steam powered, has been done and is already on the big screen, watch out for copyright?

but.., it is great I'd like to try and make a real one.

watch it on digital, your computer or something, don't bother on a normal TV ; on digital you'll see a sense of depth and blending between 2d and 3d that is out of this world and so it is unexplainable.