We're heading to a birthday party this morning and it made me start think about my kids birthday parties. I need some opinions, because the last two years there have been way too many people at their parties. It's not so much the kids, but all the parents and little siblings. I've already decided to have separate parties for Andrew and the twins, but they're still going to be way too big. Have you guys ever thrown/been invited to a birthday where you were asked to just bring the child who is the friend of the birthday child and not siblings? At what age could I do that without being rude?