I personally would want all the kids, grandkids and great grandkids in it. It is a tribute to them and I think should include everyone - their family history. Maybe do one picture with all the grandkids in it and another with all the great grandkids since you don't have room for individual pictures. Or do one picture per family - you with all your grandkids/great grandkids and one for each of your siblings famiy. However you feel best to include to everyone. How wonderful to be celebrating 70 years of marriage! Send us pictures when you are done!!!!!