My brother has a kid, and I live with them. We both stutter and we never had to "deal" with it because he never asked about it, or made fun of us in any way. Maybe my bro told him personally about it. But the kid is always patient when I stutter and never makes a face, or tries to complete my sentence or mimics me in any sort of way. I guess for him, this has become normal, and I am glad because he naturally learned to be tolrent of any personal ticks people have.