Junior Wobble Chair 16", Sand DollarThe innovative Kore Design Wobble Chair with it's gently rounded bottom encourages active sitting and allows one's knees, hips and back to find comfortable and ever changing positions, continuous movement increases Secondary Focus. Suggested for ages 8 9, Grade 3 4, child height 50" 53". A patented anti tip safety ring on the gently rounded base prevents tip overs and falls. Recommended age 8 9 years