The origins of cup stacking. According to the wiki, it began in So. Cal. in the early 80's. As I recall, we were already doing it at 1190 Dove Ave. in So. Fla. at that time. Wherever, whenever the origins, the payoff of the sport has been clearly evidenced in the life of those involved: "Proponents of the sport say participants learn teamwork, cooperation, ambidexterity, and hand-eye coordination." (I've been typing this post using both my left and right hands!) M & K: have you provided any cups for Aidan to start stacking? It's never too early.