Ten spreads with gatefolds and a culminating dramatic fold-out lead young readers from a single penguin egg to an ostrich's clutch of 10 eggs. Song-like, non-rhyming verse gives clues as to who might hatch. The answer to the repeated refrain, "Who will the babies be?", is found beneath a flap. Besides discovering the animal baby or babies, kids will also pick up a lot of nature terminology and interesting facts about animals, their birthing environments, and habitats.