A pregnant mother answers her two preschoolers' questions about babies, making interesting—and instructive—comparisons (``with sticklebacks, only the father looks after the babies, ...all the wolves take care of the wolf cubs, and baby turtles don't have anyone to care for them''). The question-and-answer format leads to a didactic tone, but the facts are well-organized and clearly presented, with Dodds' cheerful, well-integrated illustrations making a major contribution to both information and appeal. (Picture book. 3-7)