Make sure you don’t give him any kind of stress at all as he’a growing up as a child. Be the nicest and coolest person to him every second of his childhood. Get him to talk everyday. Dont mention his problem to him. He may not be aware of it. If you keep mentioning it it’ll give him anxiety and make it worse. I dont have a kid but if i do end up having one i pray he doesnt end up with a stutter. I think this might be one of my biggest fears and it saddens me when i think about it...anyway, all the best to you and your son and your family