Hello Friends, My son is 20 months old but he hasn't started to say single word. He rarely says amma and daddy but he is not using these words to address us. He pulls us to the place whatever he needs. He plays with iPhone, if i ask him to show veggies, fruit, or animals he is able to point. But says A, M for apple and monkey. He knows all aphabets and number. But he is not trying to talk, sometimes he babbles but not all times. Any tips and suggestion to encourage him to talk?