I personally think it’s unkind. If it was 6 girls not going, then fine. But to leave out just one. Not nice in my book. I can also appreciate how much it hurts. I don’t have a child with additional needs, but have worked with many, and unfortunately you are not the first that this has happened too, nor will you be the last.
When ds was 7, he wasn’t invited to a classmates party as they’d had a falling out- unbeknown to me until mum told me, and I said ‘whatever, boys will be boys, they will be friends next week’, as they were.
Then a year later we took SIX of ds’s friends bowling for his birthday, out of SIXTEEN boys in the class, and she complained to me that her son wasn’t invited!
Strangely she was their class teacher, so knew the numbers in her class etc. Therefore knew perfectly well that 10 boys had not been invited and it was not her son singled out. But apparently he was ‘upset as he’d never been bowling before’.
However one of the boys we took, had additional needs. They had all been together since reception, so the children were well aware that he had difficulty playing games, going by ‘rules’ etc, but they were taught to always include him, which they did. He was great, we had a few crawling under table moments etc, but nothing that couldn’t be handled, and when I dropped him home, as we had taken two cars to fit us all in and mum said to me ‘thank you for inviting him, because he never gets invited’. I had never noticed he wasn’t at all the parties. I always thought we had a fantastic class of children and parents, but I’ll be honest it made me look at everyone in a slightly different light.