The innovative Kore 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 Ages 10~11. Grade 5~6. Child height 54~57" Kore Wobble Chairs are Manufactured in the USA with Antimicrobial Protection against the spread of common bacteria. A patented anti-roll safety ring on the gently-rounded base prevents tip-overs and falls. Satisfaction guaranteed with a lifetime warranty. Wobble chairs provide an outlet for children with high energy or sensory seating needs like ADHD or Autism. Assembles easily in 3 easy steps and is made of durable, recyclable plastic. The maximum load weight is 275 lb. Available in 6 colors.