I made it a rule that children always have to wear eye protection when working with any tool.
We have several of these, and they are great. I can leave them on the table and they can put them on with no hassle. Occasionally though there are some kids with very small heads which is why I’m glad we have at least one of this type- the frame bends to ratchet behind the ear.
I suppose you could also could use straps too. Anything to prevent them from sliding down off of kids faces, that’s when they don’t want to wear them when they work.