Little Bobby tries to write a song that tells a story, but he's stuck on the first line: "Hey Diddle Diddle." Then his cat inspires a crazy tale, but only after getting caught up in a fiddle. (The episode retells the nursery rhyme of "Hey Diddle Diddle." The story was adapted from the tale of "The Cat and the Fiddle" in L. Frank Baum's "Mother Goose in Prose.")