A day at the zoo introduces the different animals that exist in the world, where they come from, what their natural habitats are like, and whether or not they are endangered.
If Gerald McGrew ran the zoo, he'd let all the animals go and fill it with more unusual beasts--a ten-footed lion, an Elephant-Cat, a Mulligatawny, a Tufted Mazurka, and others.
Describes the various activities in a zoo and the people who perform them, including the acquisition of new animals, the preparing of food, and the care of sick animals.