Mercer Mayer's popular Little Critter enjoys a special day in the city with his mother. Little Critter means well, but he gets himself in trouble all along the way. His mother is oh so patient when Critter loses the train tickets, picks up a dinosaur egg in the natural history museum, and misbehaves at lunch. In spite of his difficulties, Little Critter falls asleep happily on the train going home, exhausted from the big outing with his mother.