Dice stacking is a technique to take multiple dice placed on the floor etc. one at a time in cups and stack them in a cup. As I was showing off at the New Year Hakushi Games, there are also many ...

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.