1. When giving gifts to children, then parents should treat their children equally. It is reprehensible for parents to favour some children over the others without a valid reason. However, if there is a valid reason, it will be permissible to give one more than the others. For example, if among the children there are some who are poor and others who are wealthy, then in this case, it will be permissible for the parents to give more to those children who are poor.
قال النبي صلى الله عليه وسلم: اعدلوا بين أولادكم في العطية (صحيح البخاري تعليقا، باب الهبة للولد)
It is reported that Rasulullah (sallallahu ‘alaihi wasallam) said, “Exercise equality among your children when giving gifts to them.”