"Rumbly in My Tumbly" is a song from the 1966 musical film featurette "Winnie the Pooh and the Honey Tree", is also incorporated into the 1977 musical film, "The Many Adventures of Winnie the Pooh" which is an amalgamation of the first three featurettes, of which fictional anthropomorphic teddy bear, created by English author A. A. Milne?