I feel very fortunate not to have had any problems with my grandkids during theatrical presentations. I started taking them when they were 5 and they were always fully attentive.
My grandson, on the other hand, caused major problems at a Boston Pops concert--running ip and down the aisles and trying to get on stage.
As Keith Lockhart is a friend of mine, he suggested, "Next time bring reinforcements"
"Long live God!" (GODSPELL)