Discover Series Books for Babies & Toddlers Better than an aquarium at the doctor's office, FISH 2 features even more photographs of fish and other sea animals. Crisp, colorful photographs introduce children to fish from around the world and titles beneath each image make sure mom and dad can identify each little swimmer on their next trip to the aquarium. Used as a jumpstart for interaction, Discover Series Picture Books are a great way to introduce new words, images and ideas to kids.