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.
At the opening of a new toy store, Curious George makes a mess and gets into trouble, but the owner soon sees that things aren't as bad as they appear.
When Curious George visits the library he becomes impatient waiting for the librarian to read the dinosaur book, and proceeds to gather all the books he wants to read and tries to leave.