I'm a proud member of the "I love goody bags" team.
I always do them - for every party - Christmas Eve dinner, Easter lunch, birthday parties, Halloween.
(I should add, I'm a 40 year old woman with no children - I do them for all the parties with all my adult friends
So, I vote yes, if your budget can stretch to a few dollars per kid, do a little goody bag
. I especially like a little goody bag or bon bon if it's a gift-giving event. I wouldn't say you're rude if you don't do it though.