Best Sport Stacking Cups- Fun Game for the Family that Boosts Brain Power, Agility, and Coordination Fun Game: Kids of all ages are loving sport stacking, challenging their own time and their friends, too! Promotes Self-Esteem: You dont have to be athletic to be good at sport stacking; it levels the playing field for kids to excel and boosts self-esteem! Physical Improvements: Studies find sport stacking motivates kids to move, and improves hand/eye coordination, agility, and speed! Scholastic Improvements: Parents and schools state that sport stacking helps increase focus and concentration, and they see improved test scores! Convenient Carrier: A 9-inch mesh/nylon drawstring bag holds the stacked cups for travel. Theres a clip to attach to a backpack too!