Is it permissible for me to own the money that my friend gives to his underage child, or must it only be spent on him?

What is gifted to a minor becomes his property. According to the majority of scholars, a father may take his minor son's money when he is in need. According to the Hanbalis, he is permitted to take it absolutely, as long as he does not harm or disadvantage the son, or take it to give it to another child.