A.W.
I don't think it will be a problem. My kid is only in kindergarten though so we haven't gotten into this issue too much yet. Once or twice she's heard kids talking about parties that she wasn't invited to but other classmates were and it didn't seem to faze her. It's not like you can invite everybody! I wouldn't worry about it. Have fun at the party!
And umm... Denise- not to be rude but the question is right there- is it going to be a problem inviting classmates but not troop or church group members esp. since some members overlap? I guess I just don't get why ppl are so quick to respond negatively on this site. And that's how your response sounded- at least to me. Aren't we supposed to be here to support and help each other?