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. Recommended age 3+ years