How Can I Help My Friend's Child?

How Can I Help My Friend's Child? Hi everyone, I hope you don't mind me posting here, if there's somewhere else more suitable for posting, please let me know. My friend's little one has a stutter and it's important to them and me that we find ways to support them in the best way possible, but as someone without a stutter, I don't want to make assumptions about what I should do or say, or how I should help. What are some things I should absolutely not do? Some things I absolutely should do? What internal monolouge or thoughts might they be having about themselves that I should be aware of, but not necessarily talk about openly? Thank you so much in advance