Here's a good way to provide some entertainment for your four-year-old when you tuck him in at night, and at the same time, stimulate his imagination.
"I came up to say goodnight, Timmy. You had a big day, so make sure you get a good night's sleep. And don't forget to watch out for the Boogie Man. Remember when Daddy and I told you about the Boogie man? How he k**s little boys? What do you think, Timmy? Is the Boogie Man here in your room, hiding somewhere? Is he in the closet? Is he gonna jump out and k** you when I leave the room? He might; you never know.
"Maybe he's under the bed. He likes to hide there,too. He might claw his way through the mattress and k** you, Timmy. You know what he does? He sticks a sharp metal tube up your nose and s**s the fluid out of your brain. It really hurts a lot.
"I'm going to turn out the lights now and leave you alone in the dark. All by yourself. And I don't want to hear a peep out of you. If I hear any noise coming out of this room, I'm going to come up here and beat you. Try to get a good night's sleep. By the way, Daddy saw a monster walking up and down the hall last night. The monster had a piece of paper in his hand with your name on it. Night-night."