my son is 6 years old. his height is very good but his weight is very less. he is only 16-17 kg. plz help to get him healthy.

A. To help the child gain weight, include fat and protein rich foods like potato, rice, pumpkin, sweet potato, rice water, legumes, ghee, eggs, chicken, fish, banana, milkshakes with dry fruits, avocado and 500-550 ml milk everyday, Feed 3 main meals and 2-3 times healthy snacks alongwith variety of fluids.