Mostly by the US Liberal news media. And a few extremists.
Not by others I know.
Eleanor Roosevelt said, “It is not a holiday. It’s a day to work(and we all know what America was working for.)” (The New York Times, Dec. 8, 1942. Commenting on comemoration ceremonies Dec. 7 1942.)
I agree with Eleanor.
Laura Bush said, “Turn off the tv and read a book to your child.”(All US news networks and major papers reported this the week before Sept. 11, 2002. Commenting on parents plans to deal with their children on 9/11/02.)
It depends. My favorite answer. It depends on the children’s age, maturity level, questions, and attention span to name a few things. Though, I would definitely recommend more fun on that day than serious focus.