But I know that when I have parents hanging out all day, I can't get anything done. If I can,I plan games, bingo, math around the world, that the kids can be active in. Don't worry about the parents unless something is said to you. I can visualize your problem well. I am surprised that the children would act up in their parents' presence.
Kids usually behave better when their parents are around.
What has happened to me this year is that my students got more excitable during special events. I saw more behavior problems on those days. I think you did the right thing, though, by expecting that these children would follow the same good behavior as the others. The parents are visitors to the school. Of course, the parents may have actually not understood just how structured and strict we have to be at such events so that kids don't go wild.