Sandman — William W. Johnstone

Paul Kelly had a very big temper for such a small boy. When he tired of his toys, he smashed them. When a dog or cat got in his way, he kicked them. And when other children told on him, he made sure they were very, very sorry…

But that was nothing compared to what Paul discovered next. Which was that if he didn't like certain people, he could make it so he'd never have to see them again. Ever. And no one would suspect such a little boy of such a horrible deed. No one would ever guess that killing could be much more fun than playing with dump trucks and sandboxes. Especially that way Paul did it…