I am currently building a little tractor called a "Brigs Tractor". It may be a while before I am done with it, becoase I want it to have a 3.5 HP Briggs and Stratton engine with the Vertical Pull starter. These engines are very uncommon these days, and it may be hard to find one. The tractor uses parts from a John Deere riding mower, and a lot of wood.
Here is a picture.