hello sir my son is 6 year old , from last 8 months his skin colour is becoming dark . please suggest what I should do

A. Hello good morning !! Due to sun exposure skin becomes tan and dark. Using sunscreen lotion while exposing too much to the sun protects the skin from tanning and also massage at least once a week using ubtan or gram flour or rice flour with milk cream this helps in removing the tan ,dirt on the skin .