I made Bobby's Bathers a while ago - from the Sewing for Boys Book- and those upcycled shorts have slowly become a favorite.
We were in need of another pair and I chose to make a few of these. They are a bit long, but really comfortable to wear and my son likes the "treasure pocket." I made these, knowing the book sizes large and skipping the tabs and pulls in front.
These bottom two pairs are in a larger and smaller size, and the boys have gotten comments every time they have had them on. I mean, they are iridescent. The boys love matching, and they love having freedom to move.