Show a 15" long "pole." Four giant pom-poms are attached to the pole. Two at one end and two at the other. The yellow and blue pom-poms are attached to a long string at one end. The red and white pom poms are attached to a short string at the other end. Now, the fun begins. Show that the blue pom-pom is attached to the yellow pom-pom. The red pom-pom is attached to the white pom-pom. Pull the red pom-pom and the yellow pom-pom goes up. Pull the blue pom-pom and the red pom-pom goes up. Pull the white pom-pom and the yellow pom-pom goes up. It looks like every pom-pom is attached to every other pom-pom. And there's always a long string at one end and a short string at the other end. No one has ever seen a long string at both ends ... until tonight. Pull the yellow pom-pom, and suddenly, there are long strings at both ends. Separate the pole into halves and let 'em look inside. There's nothing there.