Non-Roll Away Weighted Balance Ball Offers A Flexible Chair For School And Home Enabling Increased Focus And Improved Performance. Stays In Place - Reduces Fidgeting And Increases Concentration With An Original Weighting Feature Keeping It In Place When Not In Use. Increase Focus - Keeps The Mind Engaged As The Constant Ball Movement Increases Blood Flow To The Brain. Stress Relief - Improves Performance By Providing An Outlet For Excess Energy Alleviating Anxiety, Stress And Boredom. Improves Posture - Builds Core Strength And A Healthy Posture.