Object: A piece of screen with a small hole in it.

Good morning, boys and girls. I have something to show you today that really bugs me. I mean it really bugs me. (Take out the piece of screen with the small hole in it.) Do you know what this is? (Let them answer.) That's right, it is a piece of screen. Do you know where it came from? (Let them answer.) It came from my back door. My screen door. Do you see anything wrong with it? (Let them take a close look at the small hole in the screen.) Now do you know what is wrong with my screen? (Let them answer.) That's right, there is a hole in it, and do you know what came through that small hole? (Let them answer.) Right! Bugs! Flies, mosquitos, and lots of other kinds of bugs. They all came through that one hole in my screen.

One night I am s…