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.

If you know what Cup Stacking is, you're probably a parent or a kid who graduated recently. Speed stacks have been around for more than 18 years, but it's blowing up in a big way. Not only has sport ...

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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 ...

Stacking may just be the fastest growing sport in the country. The competitions take place across the country and features participants stacking cups on top of each other as fast as they can without ...

Most sports are actually absurd. Golf involves hitting a tiny ball into a hole hundreds of yards away. Soccer is based on the idea of what if we didn't use our hands. Speed stacking — if you really ...

FAIRFIELD, Ohio -- To most people, a plastic cup is just a vessel from which to drink, but for Robert Weatherington, plastic cups mean competition. The 17-year-old from Fairfield is part of the U.S.