Clean Your Room, Harvey Moon! — Pat Cummings

Harvey Moon's room is a mess! Clothes are everywhere, sticky comic books are shoved under his desk, and there's a cookie under his bed that's so old it's turned gray and fuzzy. What a disaster!
There won't be any cartoons until his room is absolutely spotless. But just when Harvey thinks he's finally done, he discovers that his idea of clean is not the same as his mother's!