The Glorious Grandchildren website is, I think, a very good new resource for grandparents interested in all aspects of their grandchildren.
Sadly, it is not always a glorious subject, especially when the parents set out to get a divorce.
Issues of access, now called contact, often arise and "he / she won't let me see my grandchildren" is too often heard.
Need to know more? This is a useful article which explores the issue of grandparents rights.