The father has not only given them the toys to play with, but at the same time he knows what is the character of each child and what he wishes to bring out of that child, and whether that particular toy will help to bring out what he wishes to come out. The child does not know this. It happens perhaps that the toy seems poor to him and according to his sense of justice he cannot understand why that toy was given to him and not to the other. If the child was older he would have accused the father of injustice, but he does not know the justice of his father. He has to grow to that stage of evolution where his father is in order to understand the meaning behind.