The Many Adventures of Winnie the Pooh derived from three previously released animated featurettes Disney produced based upon the Winnie-the-Pooh books by A. A. Milne: "Winnie the Pooh and the Honey Tree" (1966), "Winnie the Pooh and the Blustery Day" (1968), and "Winnie the Pooh and Tigger Too" (1974). Extra material was used to link the three featurettes together to allow the stories to merge into each other. A fourth, shorter featurette was added to bring the film to a close, originally made during production of "Blustery Day" (based on the presence of Jon Walmsley as Christopher Robin). The sequence was based on the final chapter of
Piglet (Winnie-the-Pooh) and Piglet accepts. In 1960 HMV recorded a dramatised version with songs (music by Harold Fraser-Simson) of two episodes from The House at Pooh Corner (Chapters 2 and 8), with Penny Morrell as Piglet, which was released on a 45rpm EP. Piglet was originally omitted by Disney in the first Pooh film, "Winnie the Pooh and the Honey Tree" (1966). According to the film's director, Wolfgang Reitherman, Piglet was replaced by Gopher, which was thought to have a more "folksy, all-American, grass-roots image". Many familiar with the classic Milne books protested Disney's decision to exclude Piglet, and Disney relented. Piglet