As DH says we "have to" and I disagree.
DD will be 2. DN is 6. He's a big boy for his age and like any 6 year old gets over excited, acts silly and boisterous.
DD's party will be all 2ish year olds. The bouncy castle/toddler play thing we hired is only suitable for up to age 3.
DN won't be able to use the play equipment and he can be too rough which I wouldn't be happy about with a load of toddlers. We have also never been invited to a birthday celebration of his, not even his first birthday even though we of course invited all the family to DD's, including SIL, BIL, DN and they even brought the teenage son from BIL's first marriage.
So, based on it being completely unsuitable am I really BU in not inviting them but explaining how it's not going to be suitable?
Oh god, I'm going to get flamed aren't I?