I have 2 sons with autism, 14 and 16. My 14 year old CANNOT handle cloth facemasks. He had a massive meltdown on Monday after a Target run where he came with me. He was SO overwhelmed by sensory things on his face: the heat, sweat, damp hot feeling, and itchiness drove him mad.
Yesterday, I showed him a KN95 mask. He wore it for an hour and it was a totally different experience. No complaints.
I'd suggest getting LOTS of different mask types and trial them at home NOW to see how well the kids tolerate them.
We are DL locals and this son who had the hard time is DYING to get back to our regular park visits, but I already warned him that he would have to wear a mask.
However, I DID hear that Disney will make exceptions to the policy for people unable to wear a mask for a medical reason. So, there might be an out. I have heard there may be a wristband type indicator to give to those who can't wear masks who stop by Guest Relations and explain the situation, so that they won't be targeted by the "mask police" in the parks.