Adventures in Dinosaur City (1991)
Gil: A boy your age should be out, oh, splitting atoms, or whatever it is boys do.
Jamie: They thought about everything they'd been through: the perilous swamp, the treacherous tower, the darkness of rainbow cavern. They stood together exhausted from their adventure. Rex stared into her eyes for a long time, then his great green lips curled sadly back from his fangs and his voice was soft as he said "It's too bad it couldn't have worked out between us, but at least we'll always have Tar Town."
Timmy: You've got to be pulling my tail... THAT'S your idea of a dinosaur story?