He'll be six.
That's ok though isn't it? Six out of 25? Not too many that the others will be sad? He's asking three boys and three girls (which is just how it's fallen). A lot of the others have had just girl parties or just boy parties. Ds has been to a couple of whole class parties too and we haven't invited all the children that have previously invited ds to their parties simply because they had big parties and asked lots of people and ds is only asking children he plays with a lot.
I feel guilty though!