[Hugh R]

I built this one for my kids about twn years ago. I used steel studs and put a rolled asphalt roof on it. It's 8x12 feet with a deck. Its ship lap lumber and matches the house. The floor of the house "floats" in that it sits on pieced of wood screwed into the tree, so that it stays level. I bought a book (don't know where it is) at a bookstore that gave me some good ideas. Make it tall enough that you can stand in it.