The Kore Pre-School 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 blue, red, green, dark blue, grey, orange. Antimicrobial protection. Lifetime warranty. Made in USA. Ages 4 - 5 years. Pre-K to Kindergarten Assembles easily in 3 easy steps and is made of durable, recyclable plastic. Child height 40ā€¯-43ā€¯ Check out the Kobe Wobble Chairs for all ages and sizes up to Adult. This chair is purple.