Walt Disney's Uncle Scrooge Adventures in Color #33

Uncle Scrooge demonstrates his latest invention—a device that can shrink massive machinery to fit in a rocket—while Donald and his nephews Huey, Dewey, and Louie watch in awe. But as the demonstration unfolds, a janitorial worker with a suspiciously sharp ear slips away, already plotting to steal the secret before it’s too late.

Uncle Scrooge strolls through a parade of vintage vehicles, mildly amused—until he spots Donald Duck not just driving one, but winning prizes. Determined to outdo his nephew, Scrooge quickly acquires his own chugwagon and enters the chaotic Chugwagon Derby, where engines sputter, wheels wobble, and the race is on.