The Cat in the Hat makes another surprise appearance at Dick and Sally's house -- only this time he makes his entrance riding atop a brachiosaurus! Soon, he's off, along with Dick and Sally, millions of years back in time to see how fossils were created. Then it's on to a tour through the Cat's own Super Dino Museum -- a fabulous place where the correct pronunciation of a dinosaur's name wins a peek at the real living thing.