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.

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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 ...

Four Canadian record holders are travelling to Denver from St. Stephen, N.B., on Thursday to compete in the speedy stacking of plastic cups into pyramid formations. Four of the five Canadian ...

In the highest levels of sport stacking, which might more informatively be called cup stacking and indeed WAS called cup stacking until its organizers — and yes, it has organizers — decided the name ...