One of the girls at play group has just started stuttering and their neighbour is a speech specialist. She told them not to be too worried as it is fairly normal for kids 2.5 to 3 years of age and then they grow out of it. I hope this is the case for you. I worked with a guy years ago who stuttered and he found it so frustrating - I just made sure I never jumped in and finished his words/sentences for him.