Along with others in her peer group she has begun developing breasts and today asked if she could see her grandmother's breasts to contrast them to her mother's. This seems like quite normal curiosity which would be good to fulfill with an understanding of the diversity of human body shapes (anticipating that her curiosity will extend to genetalia and beyond), rather having her impressions developed solely from the fashion/marketing/pornographic depictions of "ideal" body types.
Our initial notion is giving her a resource (illustrated book, DVD, website) which shows in some detail a range of normal bodies, both clothed and naked, not too anatomical. We would like suggestions, both about the approach and any specific materials/titles for it.
Note: she has seen generalized depictions of puberty (the venerable "What's Happening to Me?" book), has fairly routinely seen her parents naked, and doesn't seem to be worried about her body. She's 10 years old ("middle school", although in Germany that already puts her into the high-school equivalent, so she's a "small fish in the big pond")