DD is nearly 8. Her two brothers have gone through puberty (are now 17 and 15) and she has plenty of friends with big sisters whom she has seen grow breasts and hips and "become teenagers" (her description).
She is beginning to get interested in when she becomes a teenager and has started asking me whether she thinks her breasts are beginning to grow (no!). I would like to buy her a nice book about puberty (not about sex) for girls and boys. Any ideas?