Responding to real-life questions and concerns from younger boys about their changing bodies, Madaras covers a wide range of topics at a reading and understanding level that's just right for them: the growth of sex organs, body hair, and facial hair; weight and height spurts; the unwelcome appearance of acne and body odour; shaving; circumcision; erections and ejaculations; feelings about puberty; and bullying.Illustrated throughout with lively two-colour drawings, "On Your Mark, Get Set, Grow!" is the newest entry in the popular "What's Happening to My Body?" series that has influenced an entire generation of readers.