Harold and the Purple Crayon - WikipediaHarold and the Purple Crayon is a children's book by Crockett Johnson. This is Johnson's most popular book. It led to a series of other books, and inspired many adaptations. The protagonist, Harold, is a curious four-year-old  boy who, with his purple crayon , has the power to create a world of his own simply by drawing it. Harold wants to go for a walk in the moonlight, but there is no moon, so he draws one. He has nowhere to walk, so he draws a path.
Harold and The Purple Crayon