The family drives up to the Natural History Museum. Calvin sees the stegosaurus in front. Calvin can't wait to see the dinosaurs and rushes from the car. Mom says it's been a while since they were at the museum. Dad mentions that was at the museum's request. That reminds Mom, who tells Calvin not to bite anyone this time. Calvin is already roaring like a dinosaur.

Mom asks Calvin what kind of dinosaur they're in front of. Calvin tells her it's a stegosaurus. Mom says it looks ferocious, but Calvin tells her it was a plant eater. He tells her the tail spikes were for self-defense. Mom then asks if tyrannosaurs fought them. Calvin tells her of course not. Tyrannosaurs came millions of years later. Calvin walks to the building telling her not to embarrass him when they go inside. Dad wonders why they're going in if he knows everything already.

Calvin shows Hobbes a picture and asks if he wouldn't say this was a great drawing. He says his teacher didn't like it. She said it wasn't "serious". Calvin wonders who made Miss Wormwood the arbiter of aesthetics. He claims the picture is a beautiful work of power and depth. Hobbes asks if it's a stegosaurus in a rocket ship. Calvin says see, Hobbes understands it.