Silly Symphony is an American animated series of 75 musical short films produced by Walt Disney Productions from 1929 to 1939. As the series name implies, the Silly Symphonies were originally intended as whimsical accompaniments to pieces of music. As such, the films usually did not feature continuing characters, unlike the Mickey Mouse shorts produced by Disney at the same time. The series is notable for its innovation with Technicolor and the multiplane motion picture camera, as well as its introduction of the character Donald Duck, who made his first appearance in the Silly Symphony cartoon The Wise Little Hen in 1934. Seven shorts won the Academy Award for Best Animated Short Film.