hello sir, my baby going to turn 2yrs next month but still he is not listening while calling by his name. anyone including me he is doing as his wish. never listening our voice.. but he observing our voice while we singing rhymes & playing something & tv mode rhymes advertisement & bell sounds all he knows and observe sound he came to Hall and the where the sound came.. I don't know why he behaving like this sir. what should I do for this and am always speaking and interacting with my kid.