my friends son didn't learn to talk very well because he needed tubes put in his ears. Most kids who need tubes have crhonic ear aches/infections, but some don't. What happens with the fluid is that the pressure build up in his ears makes it difficult for the ear drum to distinguish consenants. He could here vowls and strong consenants but but the quiter letters like w, L, S, Y, and so on he couldn't hear so he never learned to say them. You should talk to pediatrician about it and she may or may not suggest taking him in to see a speach therapist. But if there is a problem you want to catch it as soon as possible so he's ready for kindergarten on time.