4. Soccer Ball

A: Why is this soccer ball pink?

B: I bought it at the breast cancer fair.

A: I thought that all soccer balls are black and white.

B: The pattern isn't what makes it a soccer ball!

A: Then what makes it a soccer ball?

B: What's important is the material it's made from.

A: What's so special about the material?

B: It allows the ball to bounce, but not too much.

A: I see. It would be hard to control a bouncy ball.

B: My ball is a little flat, though.

A: We'd better fill it up. If we don't, it won't even roll.

B: Have you seen the air pump?