The youngest of the three lazy sons has a kind heart, which gains him a magic flute, which brings the king's rabbits running, which wins him the king's daughter--after he's humbled the princess, the queen and the king and started to tell ""a whole sackful of truth"" about it. Which would be more amusing if the illustrations (eleven full-page, full-color) told more of the story, if they were less flatly stylized and more in the changing spirit of things.