My DD's birthday party last year was quite a relaxed event. We just hired a hall and a bouncy castle and took along some other toys and just let the kids do pretty much what they wanted. Most spent the whole party on the bouncy castle! Food was the same. It was all laid out for parents and kids to help themselves when they wanted. Quite a few parents asked if they could bring their child's older siblings and since it was so relaxed I agreed. This year, because my DD is older and more aware that it's her birthday, we have hired a small soft play and because of its size, the only children there will be party guests. Numbers are limited and we have to pay per child. Am I being unreasonable to say no to anyone who asks if their older children can come too? In my opinion a birthday party is a time for my DD to celebrate with her friends, not a bunch of other children she doesn't know. I also don't see why I should be paying for these other children's meals, party bags etc. Also, I would love some advice on how to tell parents their older children are not invited as I have heard parents can get quite nasty about this