Tell him he did good. Help him with his school. Become his best friend, then become his mentor. Make sure that you are very important to him, and when you are the most important person in his life, offer him a puppy. Let the puppy grow, and make sure that he is attached to that puppy. Then one day, out of nowhere, take the dog away. When he tells you that that someone stole his dog, tell him that he is a worthless piece of shit that can't even take care of a dog, tell him that he is a joke and that you never really cared for him. Then burn down his house and leave a leave a note saying "10 years ago you stole my chance of getting free 3ds games. Now I have stolen all that you held dear"