Kore's " Grow With Me" Kids Adjustable Wobble Chair features an adjustable seat that allows the chair to grow with your child. Adjusts to height 15.5" to 21.5" . Ideal for children with ADD or ADHA; provides an outlet for restlessness and extra energy. The Wobble Chair means kids don't have to sit still. Best seat in any classroom. 3 year limited warranty.