A boy wants all of the pets in a pet store, but he and his sister can choose only one. End notes discuss Dr. Seuss's pets, his creative process, and the discovery of the manuscript and illustrations for "What Pet Should I Get?"

What pet should I get?: What happens when a brother and sister visit a pet store to pick a pet? Naturally, they can't choose just one! The tale captures a classic childhood moment--choosing a pet--and uses it to illuminate a life lesson: that it is hard to make up your mind, but sometimes you just have to do it! One fish two fish red fish blue fish: Beginning with just five fish and continuing into flights of fancy, One Fish Two Fish Red Fish Blue...