I have been looking for a Penny Rug or Dollar Carpet for some time. I now have one on display in my tent. Yea Ebay!
Made with felted wool, cut into circles using common everyday things like a penny or dollar coins. A stack of three one smaller or larger than the next and the stack was then sewn to a layer of wool with a burlap backing. Some things I have read say that they were very popular, as for me, I love it.