Sport stacking was invented in the early 1980s in southern California and became an over night sensation in 1990 on a segment of the Tonight Show with Johnny Carson Since then enthusiasts from far and wide have taken up the sport and have touted its many advantages It has been proven to help hand eye coordination and quickness and train the brain for sports and other activities that require use of both hands Are you up for the challenge Hone your stacking skills today By Trademark InnovationsProducts shipped new from USA, delivery 20-30 days