Patent ID: 8776727

Claim:
A multiple use modular apparatus for animals to exercise, play and rest, the apparatus comprising: a base having an upper surface and a bottom surface resting on a support surface, the base having a recess in its upper surface and having a hollow area inside of it; a generally vertical tower having a top surface, a bottom surface and side walls, and the side walls of the tower have a plurality of recesses therein positioned in tiers of rows of recesses up the side walls of the tower between the bottom surface and the top surface of the tower, wherein the bottom surface of the tower sits snugly in the recess in the upper surface of the base; and a plurality of shelf pieces each having a top surface, a bottom surface and side walls, the shelf pieces having protrusions extending from the side walls thereof, and the shelf pieces are attached to the sides of the tower by inserting their protrusions snugly into the recesses in the side walls of the tower at different positions between the top and bottom surfaces of the tower; wherein a first group of the plurality of shelf pieces are all attached to the sides of the tower at a particular height between the top of the tower and the bottom of the tower and the first group of shelf pieces have mating shapes that abut each other to create a continuous walkway all the way around the tower, and wherein at least one of the first group of shelf pieces has a hole there through between its top surface and its bottom surface that is large enough for an animal to pass through to reach the top of the walkway; wherein an animal climbs the tower by climbing up the shelf pieces, other than the first group of shelf pieces, attached to the side walls of the tower.