Harold's wonderful purple crayon makes everthing he draws become real. One evening, Harold draws a path and a moon and goes for a walk-and the moon comes too. After many adventures, Harold gets tired and can't find his bedroom. Finally, he remembers that the moon always shines through his bedroom window. He draws himself a bed, and "the purple crayon dropped on the floor, and Harold dropped off to sleep." This little gem is filled with visual and written puns.