While helping his grandmother clean out the attic, Sammy uncovers a dusty, old box. He opens the lid and finds that the box is filled with dinosaurs!Sammy proceeds to care for the dinosaurs. He fixes the broken ones, washes them in the sink, and gives them all names. In reply to Sammy's care, the dinosaurs whisper back, Thank you. Sammy does not let his new friends out of his sight, until one day he left them on a train. Sammy and his grandma go down to the train station to find his dinosaurs. He calls them all by their names and Sammy's dinosaur friends come running back.