Kore Design Kids Adjustable Tall Wobble Chair 16.5-24", Yellow | The innovative Kore Design® Kids Adjustable 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. Great for older children and young teens, the seating height can be easily adjusted from 16.5" to 24" with the 360 degree Actuator Ring to grow with your child. Suggested for ages 9-14; Grade 4-9; child height 53"-70".