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From the manufacturer

PROMOTES HEALTHY POSTURE AND MIND: Encourages kids to learn, adopt and practice a healthy posture while building core strength from active sitting and play in the classroom and at home while studying or reading and during movie time or watching TV
IMPROVES FOCUS AND CONCENTRATION: Ball movements increase blood flow to the brain, helping to improve concentration and increase focus, reduce restlessness, and prevent boredom and distractions in class by keeping the body active and the mind engaged
PERFECT SEAT FOR ACTIVE KIDS: Stay N Play Balance Ball provides a flexible seat for high energy and active kids and includes 5 soft stabilizing legs assuring the ball stays in place when not in use
PROMOTES HEALTHY POSTURE AND MIND: Encourages kids to learn, adopt and practice a healthy posture while building core strength from active sitting and play in the classroom and at home while studying or reading and during movie time or watching TV
IMPROVES FOCUS AND CONCENTRATION: Ball movements increase blood flow to the brain, helping to improve concentration and increase focus, reduce restlessness, and prevent boredom and distractions in class by keeping the body active and the mind engaged
PERFECT SEAT FOR ACTIVE KIDS: Stay N Play Balance Ball provides a flexible seat for high energy and active kids and includes 5 soft stabilizing legs assuring the ball stays in place when not in use, $14.44, $14.44