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.

Yung-Deng Lin can stack a group of cups in about 1.6 seconds, an impressive time for a 7-year-old. To give an idea of how fast the child can stack cups, the World Sport Stacking Association overall ...

Cup stacking sounds like it may be a game engaged in by a group of college age people at a bar, but that's not who practice the sport. The game or sport known as speed stacking has been around since ...

Click here for the original audio. Thousands of U.S. schools have their students race the clock to stack cups in gym class. Why? A former circus clown from Colorado named Bob Fox holds the key. Here & ...