You're Sort of Invited to a Halloween Party

The girls asked to have a Halloween party this year. We've done it in the past with good results so we said yes.
Since the girls are in two different classes this year we really had to limit the number of kids they invited. In the past we'd have friends, family and classmates. This year it's only a few school friends. We had 25 invitations so they each created a list of 12 friends to invite. We printed invitations and sent them to school.
The girls told me they had given out all the invites. I waited for people to start responding.
A few days later I mentioned the party to a mom whose children were on the list. She said, "I don't remember getting anything." The next day the crossing guard said, "Hey, before the girls get out of school I thought I'd tell you they invited me to their Halloween party."
This was when the lightbulb went off.
On the way home I asked about distributing the invitations. The girls said they hoped I didn't mind but they invited a few people not on the list like their crossing guard, school librarian, lunch lady, etc. They did give out most of the invitations to their friends, but ran out so they just told their friends about the party. Of course their friends promised to tell their parents, so the girls thought it was all working out.
I've been emailing their friends to invite them to the party. If there's one thing I know it's that those kids won't remember enough details to give their parents the information. And, if our girls said they were invited to a party I'd tell them I'd deal with it when I saw an invitation.
The good news is the parents think the invitation distribution story is funny. The better news is I found out about the problem early enough to fix it. Let the party begin!