baby is 13 months old but still doesn't want to copy any gestures, though he looks at me very keenly and smiles but do not copy any waving or pointing. he just gives high five. i am trying to make him say bye for 2 months but still he does not raise his hand, he tries to say bye bye but without gestures. he say muma papa baba light. I am worried about his physical gestures. I have stopped his screen time. what else can be done.