my 1.6 year old boy is very lean nd thin...he is active enough...but how I can make him to gain more weight... please help

A. Hello mom check as to the family genes if either of the parents as such have such body structure it can very possibly be with kids as well . Also he been active is much more important. So you may also give him foods such as fresh fruit milk shakes , dry fruits and nuts , stuff paranthas, home made butter , ghee , dals and lentils , eggs etc