Abstract: A dynamic sitting device includes a seat 20, a means for supporting the seat 30, and a novel floor-contacting element 40. Said novel floor-contacting element includes an outside edge 60 and a point 50. Said outside edge is circumferential to said point, and is positioned approximately perpendicular to said means for supporting seat. Said point is positioned near the center of said floor-contacting element and sits a short distance below a plane defined by said outside edge. A user can either balance the sitting device on said point in order to rock and spin, or rest the device on both said point and said outside edge in order to rest or to roll in a circular fashion. This invention promotes active sitting through the function of said floor-contacting element. The invention allows for both a dynamic sitting position that allows the body to be involved in maintaining balance and posture, and also a position of lesser activity and bodily involvement.