Key Features :
i : The Bintiva children's ball chair is designed especially for children, and includes wheels that can lock in place.ii : The ball chair is an exciting way for children to sit, while promoting healthy posture, and proper spinal alignment.iii : The chair combines the benefits of a therapy / swiss ball with the convenience of a real chair to hold the ball in place.iv : The chair is also recommended by educators for children that have trouble sitting still in the classroom. The ball chair allows them to wiggle, and move, while staying seated.v : The ball chair is 15" - 15.5" off the ground, and is recommended for children between ages 5 - 8, depending on the child's size.