The "Li'l Raskals Lookout" is a $5,600 6'x8' prefab kids' treehouse/clubhouse, themed with weathered wood and charmingly misspelled words intended to make it look like something cunningly built by Depression-era short-film stars. It comes from a site called PoshTots, which offers "the most extraordinary children's furnishings in the world."
(via Cribcandy)
Update: The Treehouse Workshop has a great range of treehouse books, videos, and galleries — thanks, Red!