A caterpillar hatches out of his egg and is very hungry. On his first day, he eats through one piece of food; on his second, two, and so on. Little holes cut in the pages allow toddlers to wiggle their fingers through the food, just like the caterpillar. Vivid and colorful illustrations and ingenious layered pages help preschoolers learn the days of the week, how to count, and how a caterpillar turns into a butterfly. This picture book is considered a must for every toddler's library.