Quick – take a dozen plastic cups and stack them in a pyramid, then back into a single stack again. Can you do it in just a few seconds? Then you might have what it takes to be a competitive Sport ...

Editor's note: This segment was rebroadcast on Sept. 30, 2025. Click here for that audio. In the early 2000s, thousands of U.S. schools had their students race the clock to stack cups in gym class.

The "Wisconsin Winter Stack Up" hosted some of the country's fastest cup stackers. Sport stacking is a competition in which competitors stack specially designed cups up and down in set patterns. Speed ...