Teachers are in shock. Hacky sacks are sold out everywhere. And no one can quite explain why a Gen X stoner game is suddenly the hottest thing. On a recent day, Bill Silva was walking down the hallway ...

Numerous purveyors are reporting an abrupt explosion in popularity of the peak '90s toy known as the hacky sack after recent viral social media videos, triggering shortages.

A couple of weeks ago, a gaggle of freshmen at McCallum High School in Austin, Texas, pulled out a pouch the size of a clementine and began batting it back and forth between their feet. “It took a ...