You sounds like a great mom! I am 31f, stuttering my while life but have worked on my speech and improved significantly over the years, to the point where some people in my life don't even know I have it. Here are some tips I can give. You are right to say that confidence is the key. One thing I can suggest is to help build his confidence in other ways, don't make all of his extra curricular activities about his speech. Does he like painting, music, sports? Even though I had a stutter, I was never bullied at school, because I was great in other things, like painting and reading poetry, so I always knew my worth. I know that your son is very young, so a lot of really engaging play might be a good place to start. My mom actually had a stutter as a kid and she said that her grandma sang songs with her every day (people don't stutter when they sing), and it helped her a lot, she grew out of her stutter pretty fast. And my mom still loves to sing! It was definitely a great approach for her. Overall, doing anything to help your son breath better can be a huge help. I think that's what happened with my mom and singing. I also had the biggest and most lasting improvement in my speech when I starting working out and meditating regularly in my 20s and learned how to breath properly. When I first started working with my personal trainer he had to constantly remind me to breath xD I had a tendency to hold my breath and I realized there was a big connection to my speech there. Again, your son is too young for yoga and weight lifting, but if you can find an engaging way to improve his breathing that can be a huge help! Maybe do it in a way where it's separate form his speech, and make it fun. But if you are open to meditation, I would totally recommend it to anyone at any age, it's the best!