Does he watch YouTube? There's a 10 year old who stutters that has his own channel and it's pretty great. Jacob Speaks: https://www.youtube.com/channel/UCasuoPpqwzduHpP8IZ0tSXA Also this video on Stuttering awareness might help y'all a bit too! Just know there are a lot of resources out there now more than ever to help. https://m.youtube.com/watch?v=NWf56jq4rco&feature=share I'm curious about it, do you know what the other kid said to him, was it mean or curiosity? I've found that kids these days really don't care as much (mileage may vary in places) about Stuttering, but I can see it being off-putting to your son about it being brought up to his face by someone else.