My 22 months baby is not speaking yet. He understands some comman instructions, listens to his name perfectly(sometimes ignores when engaged in playing), speaks mama, papa, and lots of bubbling and gargling sounds, he points to the things he wanted to play with or drink, but whenever tried to talk with him, he ran away and engaged himself in playing. He sees TV and cartoons , listen to songs, operates mobile very efficiently I.e. reaches to his desired videos and photos, makes calls, view youtube videos, ran in the whole house and on calling for kissing, he promptly come for kissing. The only thing is that he is not speaking. What to do??