And here's a book where the copy I got was brittle enough that I wanted to scan it before I even actually read it. Luckily it didn't shed as much as I feared:
Peter Wheat Fun Book now on the FTP.
Jon's quote from the Fort Mudge most suggests the Fun Book has some Kelly art; I don't think it really does other that possibly the head of Peter Wheat on the cover, which looks to be stock art. It does have a fair number of Kelly swipes, though- the art isn't by Hubbard either. It does look like something I would have found incredibly fun as a little kid, though- a comic story roughly running through a variety of games, puzzles, and projects. It's also the largest Peter Wheat item I've seen yet- close to magazine size on heavier paper and running a full 32 pages.