My son is 4 years old.. He was very active and interactive but this year after he joined school he seems to be very shy and quiet there.. He doesn't say anything and even doesn't eat anything in school or any other place outside home.. At home he is still active and talks a lot.. Also he eats very few food items.. Other than food ( Dal, Rice, Chapati, Vegetable) he doesn't take anything else ( Dosa, Any Snacks, Bread, etc).. How can I improve his eating habits and communication outside home.. ?