Object: a half-inflated ball and an air pump and an adult volunteer

Good morning, boys and girls. I brought this ball today for (adult volunteer) and I to play with. (Kick the ball to adult volunteer) Hmmm. It didn't go very far, did it? This ball usually rolls and bounces much better than that. You kick it back to me and see if it works any better. Nope. It's still not rolling right. I wonder what the problem is. Oh, that's right, it doesn't have enough air in it. I've played with this ball so much that it ran…