The unique, modern, and ergonomic design of the Hierarchy Flipz Stool fits right in today's classroom, allowing kids to be active even while sitting. This stool is double-ended. One end is designed for stationary seating and the other slightly-convex end allows for gentle rocking. Both ends feature slip-resistant rubber on each end for stability. This stool works like an exercise ball to keep a child's body moving, burning off extra energy and providing an outlet for restlessness. These stools stack vertically when not in use. Available in a variety of bright colors.