Trivia: Happy Harmonies
- Hey, It's That Voice!: Bernice Hansen, a voice actress notable for playing many cute cartoon animals in 1930's cartoons, voices the mice in "Alias St. Nick" and the eponymous mouse in "Little Cheeser".
- Keep Circulating the Tapes: Only 19 of this series cartoons have seen any kind of DVD release, and even then, it's only as bonus features scattered across several vintage movie DVDs). The only major release of many of them was an old, long out of print laserdisc set. Many of them used to air on Boomerang early in the morning up till June 2014, but some shorts, such as the redesigned Boskos, may never see the light of day again.