Discover Series Books for Babies & Toddlers It's somebody's birthday! There might be 364 days each year without birthday cake, but that doesn't mean you can't celebrate. Ramp up the birthday excitement (or weather the post-party blues) with this collection of brilliantly colored birthday-themed photographs. Babies and toddlers will love flipping through the simple and colorful photos while older children can create and recreate birthday parties of their own. Used as a jumpstart for interaction, Discover Series Picture Books are a great way to introduce new images, words and ideas to kids.