[RStar]

I took some cardboard mini drums from work (that were going into the trash, but were clean) and cut the bottom off one and removed the lid making a tube. Then I took another one and did the same thing, then cut it in half. I covered them, the plywood base (from scrap), and some 4 by 4 post (also scrap) with carpet (from our house when we had new carpet installed) and made one for free. After about 5 years it got pretty ratty and I tossed it or I'd post a picture. I got the design from one I saw at Petsmart.