Have you ever wondered how the great Dr. Seuss wrote his most famous book? Did you know that for The Cat in the Hat, he wasn’t allowed to make up the fun words he was known for—like OOBLECK and IT-KUTCH and HIPPO-NO-HUNGUS? He was only allowed to use words from a very strict list! This bouncy account of the early career of Dr. Seuss (a.k.a. Ted Geisel) proves that sometimes limitations can be the best inspiration of all.