Yesterday I had my first "extended wear" time with a mask (cloth, I make them myself) that lasted about 2 hours. It was harder than I thought to keep calm with it on. It was a followup mammogram appt, so that might have been part of my problem, the anxiety from waiting (it turned out okay) but I couldn't picture myself in the heat of Orlando wearing a mask for hours upon hours. For that matter, i can't see myself being comfortable right now wearing one for hours at the school I work at. So I'm going to practice wearing one myself, once this heat wave breaks.
One other thing I noticed - unless I lint roll the inside of my mask before I put it on, I'm always finding cat hairs inside that bug me to no end. I wash my masks after every use, and steam press them as well, but still the cat hair gets in. So check the inside of the masks your sensitive kids use to make sure there's nothing there to make it even harder to wear!