Already a part of P.E. classes in over 10,000 schools, Speed Stacks® from Play Along® is the new competitive sport of speed, action, and coordination. Unlike anything on the market, this Speed Stacks® StackPack® in blue will improve your dexterity and hand-eye coordination. Unlike "freestyle" activities like a yo-yo or juggling, Speed Stacks® is competitive; you can play solo against the clock or go head-to-head against friends! It's also more active and healthier than electronic games.