The Bank is part one of the lesson. It's made in a way that is sturdy for young ones but sophisticated for older children.
Next, as you help your child learn about money, a common rule to teach is to spend 70%, save 20% and give 10% (tithe).
Malachi 3:10 - Bring the whole tithe into the storehouse, that there may be food in my house. Test me in this,” says the Lord Almighty, “and see if I will not throw open the floodgates of heaven and pour out so much blessing that there will not be room enough to store it.