Start with 12 plastic cups. Use stacks of three, six and three cups to make and dismantle a series of pyramids until you are left again with the original stacks, the 3-6-3 combination. Tyler Ludwig, 8 ...

Blink and you might just miss it. The blur of crisscrossing hands and zigzagging neon cups is probably the weirdest organized sport you’ve never heard of. Dubbed sport stacking, this rapid-fire ...