Playboy's original name was Stag Party, and instead of a rabbit, its mascot was a buck. Hugh Hefner changed the name to Playboy at a friend's suggestion after the name Stag Party was challenged in a trademark infringement case.
The first jungle gym was invented in 1920 and patented by lawyer Sebastian Hinton in Chicago. It was sold under the trademarked name Junglegym. The term "monkey bars", was first documented in 1955 [wikipedia]
