I'm not sure whether to be concerned or not. He walks great but everything else seems a little off. He used to say dada all day long but for the past month he's not said it at all, the only other word he says is mama and that's only when he's really tired. He doesn't babble just sometimes squeals. He's obsessed with the TV to the point that if I had it on all day he'd stand there all day watching it (I obviously don't). When he's excited like when TVs on he'll stand rocking side to side and flapping his hands the entire time. He doesn't wave or stick his tongue out to copy me. I know we shouldn't compare children but he's totally different to my others as babies. Does anyone else think this sounds a bit different to usual?