Object: balloons, enough for each child and something to pump them up (or have them pre-filled).

Have you ever seen a light bulb that was burned out, or tried to use a pencil that didn't have any lead or a ballpoint pen without ink? If you have ever seen or tried to use any one of these items, you know how disappointing it really is. You don't know that the light bulb is burned out until you try to use it, and the same thing is true with the others. How many times I have tried to make an old ballpoint pen work, and it just won't. All of these things have good bodies, but there is no life left in them.

Let me show you something else that works that way. What is this? [Hold up the balloon.] That's right, a balloon. Or is it a balloon? What are balloons supposed to be able to do? [Wait for …