When Grandpa puts on his magic shrinking cap, it makes him small enough to fit into Jason’s pocket. Jason and Grandpa get up to lots of mischief and fun, but they always have good intentions. In this volume the family is taking part in a singing concert at Miss Smiley's Cafe. Opera singer Madame Vibrato tries to help everyone make the music come alive. And sure enough, it does! 7 stories.