For girls with Down syndrome starting puberty, I would recommend Special Girls' Business but for parents who want simple ways to explain and discuss things and for older girls who want more information, I would recommend More Secret Girls' Business. I look forward to More Secret Boys' Business which I hope is coming out soon.
Other puberty resources in our library:
Janet gets her period
Talk to me: A personal development manual for women and girls with Down syndrome and their parents Available Online
Down's Syndrome Scotland also have some good resources online
These resources are available from our library, just email us.