I'm with the majority here: If you invite other children to take part in an activity, you pay -- especially since cost wasn't discussed up front. Yes, it would've been wise to check the price up front, but I probably wouldn't have done so either; I would've just assumed that it's a regularly-priced movie.
At this point, I'd just suck it up and pay for the tickets . . . but I would tell them, "no snacks this time". My own kids know that sometimes I'll pop for snacks (no pun intended), other times I won't.
Now, there are some circumstances in which the kids might end up going "dutch". For example, a bunch of our kids love going to "skate night" once a month, and we moms take turns driving them. It isn't like the mom who drives particularly invited them to go -- instead, it's a school event. So they all bring their own money. And if teens make plans to get together, that's more of a kids-planning-their-own-thing deal, not a parent inviting other children to take part in something.
At this point, I'd just suck it up and pay for the tickets . . . but I would tell them, "no snacks this time". My own kids know that sometimes I'll pop for snacks (no pun intended), other times I won't.
Now, there are some circumstances in which the kids might end up going "dutch". For example, a bunch of our kids love going to "skate night" once a month, and we moms take turns driving them. It isn't like the mom who drives particularly invited them to go -- instead, it's a school event. So they all bring their own money. And if teens make plans to get together, that's more of a kids-planning-their-own-thing deal, not a parent inviting other children to take part in something.