My now 11year old son was a late talker (about age3) and developed a stutter ("disfluency" as his speech therapist called it) around 3 1/2....mouth couldn't keep up w/ all his thoughts...his speech therapist worked with him and he got over it....keep an eye (or ear) on the situation -- it may be a phase ...I've heard of some kids about your son's age going thru this kind of Phase...If it doesn't clear up or if it makes you feel better, get him checked out by a speech pathologist
Updated
My now 11year old son was a late talker (about age3) and developed a stutter ("disfluency" as his speech therapist called it) around 3 1/2....mouth couldn't keep up w/ all his thoughts...his speech therapist worked with him and he got over it....keep an eye (or ear) on the situation -- it may be a phase ...I've heard of some kids about your son's age going thru this kind of Phase...If it doesn't clear up or if it makes you feel better, get him checked out by a speech pathologist
Updated
My now 11year old son was a late talker (about age3) and developed a stutter ("disfluency" as his speech therapist called it) around 3 1/2....mouth couldn't keep up w/ all his thoughts...his speech therapist worked with him and he got over it....keep an eye (or ear) on the situation -- it may be a phase ...I've heard of some kids about your son's age going thru this kind of Phase...If it doesn't clear up or if it makes you feel better, get him checked out by a speech pathologist