Very cute. Checked it out from the library and knew we'd be buying a copy. Daughter loves it. We can't drive past a rocky wall of any sort that she doesn't say "I bet Humpty Dumpty can climb that wall!"
I teach first grade and my kids want me to read their library books to the class. One of my kids got this one and the class loved it (and so did I). It's a lot of fun. I got my own copy for future classes.
As an avid rock climber, I've been giving this book to my rock climber friends for baby showers. The "P.S." page at the end clinches the deal (reminder to use safety equipment... and wear pants). Love it!