Transforms a school chair into a wobble chair enabling kids to have an outlet for excess energy while working, alleviating anxiety, hyperactivity and boredom while increasing focus. Kid’s concentration grows as they rock back, forth and all around because the continuous movement increases blood flow to the brain enabling greater attentiveness. Simple installation as each 3.8” diameter cup snaps right onto standard round school chair glides with no tools required. Includes 1 set of 4 feet. Black/blue. Safety tested.