Homework, reading, drawing, eating or board games are no longer sedentary activities. The Kore Kids Wobble Chair has a gently rounded bottom to encourage active sitting and increases secondary focus. Great outlet for kids with high energy or sensory needs like ADHD or Autism. A patented anti-roll safety ring on the gently-rounded base prevents tip-overs and falls.. Also in dark blue, purple, black, orange, green. Antimicrobial protection. Lifetime warranty. Made in USA. Ages 10 - 11 years. Grades 5 ā€“ 6. Assembles easily in 3 easy steps and is made of durable, recyclable plastic. Child height 54ā€¯-57ā€¯ Check out the Kobe Wobble Chairs for all ages and sizes up to Adult. This chair is grey.