I wanted a tree house when I was a little girl. I wanted a big one with a real door and windows like the boy across the street had. On drippy summer afternoons all the neighborhood kids would gather in Tim's tree house. We'd play cards or Monopoly. We'd joke, argue and eventually one of us would stomp off down the ladder, swearing to never come back. But we always did. Tree houses are part of the idyllic American childhood experience. I'd live in one now if I could but there aren't that many…