Abstract: A self-supporting structure for the play and relaxation of cats is disclosed. A first, second and third cylindrical tower define respectively a first, second and third length from a first, second and third bottom end opposite a first, second and third top end. A flat triangular base defines a bottom side opposite a top side. The flat triangular base is configured to be attachable at each of its triangular ends respectively to the first bottom end, the second bottom end and the third bottom end of the cylindrical towers. A second diameter and a third diameter of their respective cylindrical towers are each less than a first diameter of the first cylindrical tower. The second length added to the third length is less than the first length. The second and third cylindrical tower are configured to be disposed inside the first cylindrical tower during shipping.