Hi, J.. I know exactly what you mean in wanting a well-mannered, unspoilt child. I'm the same way. And, I have to say, that for the most part, my husband and I have managed it, because we receive compliments about our children's behavior from other people at least twice a week. I'm not bragging - I'm just saying you will have it, if you want it. That being said, your son is perfectly (age-appropriate) normal, doing what he's doing. He's expressing himself the only way he knows how. The fact that he is smiling at you when you respond shows that he's proud of himself...after all, he's learning to communicate! He makes that noise, and mommy talks to him - how cool is that?! And please, please don't listen to those that say you should ignore him. He is far too young for that. A baby whose needs are not met becomes a manipulative child and adult. Maybe try chattering to him when he starts that, so that he knows you are listening to him. And the suggestion that you model another sound for him to try was a good one. Keep loving him as you already do, and enjoy, enjoy, enjoy! He is growing so fast! One last note - as for the one who said you WILL see a tantrum from him when he gets older........neither of my children ever threw a tantrum. Personality, perhaps, I don't know...but I do know from experience that some children don't, and perhaps yours won't either. I've worked with children in one capacity or another for 35 years, have a 5 yo girl & 8 yo boy, and am a big promoter of Dr. Sears' philosophy of child-rearing. Blessings to you and your beautiful boy!