This is a good suggestion. For some people with sensory processing issues, things that feel normal to others can feel incredibly annoying, uncomfortable, or even painful. You know when you’re down to the last pair of terrible underwear and they bother you all day long? Or when there’s a whiny kid nearby and you just need some peace and quiet 
? Or when someone shines a light straight in your eyes or blasts the music so loud it hurts your ears?
It would be interesting to see how the kid responds to some good headphones or a lower light level inside or some sunglasses. Maybe it would help, maybe not.