Yes I urge you to check him out . at this age ( your son is 6-7) , he will use an approach called F.A.S.T that will make your son recover in just a few sessions. And if youre far he gives online sessions . Just trust me and go check him out, at least check his website and check him on youtube his name is Tim Mackesey . He used to stutter for 30 years of his life and now he doesnt .