my baby is 2 year old he is speaking only 12/15words properly other Tim he babbles ..I m trying to teach him from 15days bt he is not speaking ..he identifies fruits animals objects ..he understands all instructions that I tell him..he follows all..when I insist to talk the daily use words bt he starts crying he doesn't speak ..he directs all things that he wants..I talk him daily 2/3hours as I only cares him at home ...what should I do now..is he need speech therapy sessions I also trying that method also...he sometimes respond to vowels bt sometime not..plz give reply