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.

On the first day of doubles practice, Team Josh wrestles with the unavoidable intrusion of extra hands and fingers in the shrinking and swelling plastic pyramids of sport stacking cups on the StackMat ...

Some of the world's fastest cup stackers are right here in Philadelphia. What's cup stacking? It's a growing sport, as school officials found out this week. KYW's Mike DeNardo says don't blink. If you ...