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 ...

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.

It may well be the fastest sport you've never heard of, but speed stacking is serious business. Jaydyn Coggins first became interested in speed stacking when he was six He recently won a world ...