Between May 1924 and September 1926, the Fleischers released 36 "Song Car-Tunes" series, with 19 using the Phonofilm sound-on-film process. The films included "Oh Mabel", "Come Take a Trip in My Airship", "Darling Nelly Gray", "Has Anybody Here Seen Kelly?", and "By the Light of the Silvery Moon". Beginning with "My Old Kentucky Home" (1926), the cartoons featured the "follow the bouncing ball" gimmick, that lead the audience singing along with the film. The other 17 films in the Song Car-Tunes series were silent, designed to be shown with live music in movie theaters.