While waiting for the man with the yellow hat to buy train tickets, Curious George causes trouble by mixing up numbers on the schedule, but he makes up for it when a little boy's toy rolls toward the tracks.
While on a field trip to a fire station with Mrs. Gray's class, Curious George goes off on his own and is soon at the scene of a fire, where he finds a way to be helpful.
Curious George's natural agility gives him an unfair advantage when he joins a volleyball game at the beach, but it also helps him rescue a little boy who almost falls off a pier.