Don't ever bet against the Doc. His editor Bennett Cerf once bet him that he could not write a book using the same 50 words. Seuss did, winning $50, and publishing the much beloved Green Eggs and Ham. (Source.)

Seuss may be well known for the character of the Cat in the Hat, but he was no stranger to headpieces himself. In his studio, he had a closet full of hats that had been sent to him from children around the world. Here at Shmoop, we collect ties, so send 'em along, kiddos. (Source.)

Dr. Seuss is a lot like Shakespeare, it turns out, and not just because of the poetry thing. Both writers made up their own silly words that entered into the general lexicon - in Seuss's case, the word "nerd" first appeared in his book If I Ran the Zoo. (Source.)

We may know him by his penname of Dr. Seuss, but Theodor Seuss Geisel had a couple other monikers up his sleeve. He also wrote as Theo LeSeig, Rosetta Stone, and the tongue-twister Theophrastic Seuss. (Source.)

It's not just television shows that parody the book's title. National Geographic published an article on coral reefs titled "One Fish Two Fish Red Fish Blue Fish, Why Are Coral Reefs So Colorful?"

Are you into riddles? Or better yet, are your kids into riddles? Show 'em this math/Dr. Seuss mashup and see if they can figure out the hidden meaning.