If inviting the majority I would be tempted to invite all kids though, I don't think it is nice to leave out only a couple of kids.
Yeah that!

To exclude only a couple would also be seen to be mean. Sometimes a child's perception of mean and nasty is completely different to an adult's. I can remember a few years ago DD coming home saying a classmate was being "mean" to her, when I delved into it some more I discovered it was simply because this child had stepped on her heels when lining up!