Having 2 young kids, this has always been an issue for us. The incredibly kid-unfriendly environment leads to parents like us who go and many times either get nothing out of the meeting or many times even regret going.
Many acknowledge that even adults have a hard time sitting at attention for 2 hours, that kids have it even worse, but no one from a high level will do anything about it.
We actually had a time at our hall where they would 1) encourage parents to take their noisy kids back 2) not allow you to stand in the back with your kids and 3) not allow you to hang out in the bathroom or back school! So I guess the answer was just don't go. One sister once left early after getting mad.
Additionally, "KIDS, DON'T HAVE FUN". They were discouraged from reading non-bible books, coloring, etc. So a 5 year old is expected to sit quietly with a WT in their hands. Yeah...
This may not seem like a lot if you don't have kids, or are fortunate to have quiet kids, but for most parents all this really sucked and became a good reason to miss meetings.