Get ready for a ROARSOME time! When Max visits a local museum, he wishes he could ask the dinosaurs a bunch of questions. Since the museum is about to close, the curator (Dinosaur Dora) says, "Why don't you write our T. Rex a letter? He might even write back." And so begins a pen pal relationship unlike all others. At first, T. Rex's letters make him seem like a big, toothy tough guy who's too busy to write friendly letters to tasty little humans. But once Max and T. Rex start trading letters, they share funny jokes, silly facts, a baby tooth, rubber duckies, and more. This unlikely duo soon embark on an unusual friendship that spans the ages...and even includes very real cards and letters to open.