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.

JOPLIN, Mo. — It was cup stacking time again at St. Mary’s Elementary in Joplin. Part of the school’s annual “stack up” event where kindergarten through 5th grade kids were part of a world record ...

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 ...