unfortunately, our children will only have one set of grandparents, and depending on how soon we have our first child, it may have one great step-grandfather for a short period of time (he's almost 99!). DH has already lost both of his parents, but mine are here (dad 55, mum 48) - neither of them are paticularly healthy though

your little boy is very luck to still have so much of his family around - i grew up really only knowing one set of grandparents til my mid teens when i developed a relationship with my one great grandmother that was alive, and my other grandparents - i think it's great that your son will have this relationship from so early on!