The Mickey Mouse Theater of the Air, an NBC musical-variety radio series for children, sponsored by Pepsodent and broadcast from the Disney Little Theater on the RKO lot from January 2 to May 21, 1938. With music by Felix Mills , the opening theme was Who's Afraid of the Big Bad Wolf?. Walt Disney was the show's host and also the voice of Mickey Mouse. The Sunday afternoon show also featured Donald Duck (Clarence Nash), Minnie Mouse (Thelma Boardman), Goofy (Stuart Buchanan) and other Disney characters.