I ask this because I have a 4 yr. old nephew who can speak wonderful for his age, has a huge vocabulary, no speech impediments, but it seems the whole time he is talking to you, about every 3rd or 4th word, he will say "Will you 'um um' get me a drink? 'um um' I'm thirsty 'um um' and I can't find my 'um um' mommy" That is just an example. I haven't been around many young kids, and I was wondering if that is an attention thing, or just a learning thing, or maybe just the way he talks? I have heard some adults who have attention issues say "um" a lot, but I just want to know if that is something all kids do? My son is just learning to talk, and I'm not saying I want to prevent it, but should I expect it?