My 3.5 yr. old son has begun stuttering. For a long time now (about 6 months or so) he's been repeating words, but I haven't been too concerned about this. However, over the last week or so, he struggles to get the first few letters out. For instance, he'll ask "wwwwwhhhere's the dog?". And I've noticed it often involves the "what", "where", and "why" questions. It doesn't happen all the time.