Bizarre bicycle safety film from 1963

I had the privilege of viewing this film, "One Got Fat," two or three times in grade school in the early-to-mid seventies. It's the story of Filbert, Nel, Stan, Mossby, Rooty, Floog, Orv and their friends--all creepy monkey-faced humans--who bicycle ride to a park nine blocks away, all but one coming to an unpleasant end. (Hat tip: Radley Balko at The Agitator.)