The role of Disney in children's cinema from the 1930s meant that it gained a unique place in the production of children's music. The first popular Disney song was 'Minnie's Yoo Hoo' (1930) the theme song from a Mickey Mouse cartoon. After the production of their first feature-length animation "Snow White and the Seven Dwarfs" in 1937, with its highly successful score by Frank Churchill and Larry Morey, which included the songs "Whistle While You Work", "Some Day My Prince Will Come" and "Heigh-Ho", the mould for a combination of animation, fairy tale and distinctive songs was set that would carry through to the 1970s with songs from films such as "Pinocchio" (1940) and "Song of the South" (1946).