Wife asked me to build her some rabbit tractors. Don't ask me why they are called tractors. They certainly aren't something that leaks oil (my definition of "tractor"). Anyway, she is happy and that is all that matters. They are 4" x 8" x 2". The one end contains a raised condo for them (4 x 4 x 1). The condo also provides shade under it during the heat of the day. The four roof sections open individually. The frames are all cedar, cut down from 5/4" decking. They get moved around the yard & the bottoms are open so the rabbits can eat the grass. Guess that makes them "lawn tractors".