DD is ASD. Her birthday is next month and she decided she wants a day out at a local theme park rather than a class party. BUT, this year, for the first time she has made 3 or 4 good friends. I was thinking about inviting them over for a bit of a birthday tea, but her (mainstream) school is small and they only have around 9 girls in the whole class. DD would not cope if I invited all the girls from class but I feel like inviting these 3 or 4 girls for tea and cake would be a huge step for DD but I don't want other people to feel left out. So do I go ahead and invite the kids she has made good friends with? or leave it with the risk it could isolate her more from other kids in her class? DD is year 1 and turning 6 if that makes a difference.