1939's 'The Wizard of Oz', which is based on L. Frank Baum's novel 'The Wonderful Wizard of Oz', has become one of the most beloved movies in cinematic history.While the 1939 film is the movie most associate with the book, it was not the first attempt at adapting the source material to the big screen and had previously been made into a silent film in 1925 and a Canadian animated short in 1933.