Bought a new game

Yesterday after work I had planned to stay home I did not want to do anything but my son have plans of his own. He wanted to go to Game Stop to buy a new game for his Nintendo and I tried to talk him out of spending his money but he kept asking me to go. He had saved $15 from his weekly allowance and he said that it was enough for a game. When we were in the store he found the Transformer game it was $20 for a pre-own game so his money was not enough. He asked me to buy it for him I knew that he really wanted the game so I bought it. Now he can not stop playing with even when we went to the apartment complex of my friend he was playing the game with him. I hope he will not ask for more games because it will cost me more money.