Some preschool kids find it impossible to wear a kippa for any length of time. How do you deal with that?
ETA: I'm not asking how you deal with it the minute it happens. But what's your longer term attitude? Let's just cancel the kippa for this year?
The masking is for now. So long as the kid isn't wearing the mask, they are not protected.
A kippa at that age is educational. When it falls off, the child can be encouraged to put it back in any number of ways. One way that I find is the worst is the strict disciplinarian "you can't have it off your head for even a second" method, which just makes the child hate wearing it and gives it extremely negative associations. I have a 4 year old boy and you'll see him without a kippa plenty. The second I turn it into a fight, I've lost. So long as he's in control, he enjoys wearing it, and he will actively choose to put it back on.
But there are times, let's say flying, when you really do need your kid to put on the mask *right this second*. Many parents don't have any methods outside of force under that kind of pressure, and you don't have the benefit of a long term strategy. And any educator or parent can attest, that those wins are very short lived.
A kippa is not at all uncomfortable for most kids, it's a matter of falling off more than being ripped off. Most kids don't realize they are wearing or not wearing it until someone points out out to them. The masks are uncomfortable. Even when my son asked me for a mask to get on the bus last year, he still didn't wear it properly.
And even if you somehow find a comfortable mask, and have a child with the temperament that they'll wear it properly, the gain is minimal, even according to those that say there is any gain at all.
And if there is that minimal gain, if your argument is that that gain is worth the harm masks cause kids of that age, surely that would only be a temporary solution. Your comment seems to imply masking is a long term thing, like wearing a kippa. In that case, yes, absolutely cancel the masks. But not just for preschool, for elementary and high school as well.
