my is 4 year 5 month old his waight 16.5 kg he is very slim. How can I increase my son's weight?

A. Mam as per my knowledge and WHO standard your child is having a perfect weight gain as per the age I don’t know why you feel your child is looking lean or weak but this is very good don’t overdo anything to make your child healthy because your child is in perfect range as per the age