Actually it wasn't hard to make at all. And no machine sewing involved. I just took a bit of felt and cut a small square out of it. Then I folded it over and cut the felt so that two of the corners had a bit of a curve to them. After that, I sewed all but one of the sides together. Then I turned it inside out and stuffed it with poly-fil. I took some nylon string stuff and tied a knot in one, but the knot side into the mouse, and then sewed up that last side. All in all, it took 15 - maybe 20 - minutes to do.