This was the result:
Materials
3" x 4" piece of felt
Embroidery Floss
Needle
Zipper
2. With your sewing machine sew back and forth across the zipper to shorten your zipper so that it is just a little longer than the short end of your piece of felt. Cut off the excess.
3. Place one short end of the felt over one side of the zipper. Using the embroidery floss, sew the felt to the zipper with a running stitch.
4. Fold the other end up to meet the zipper as well. Again, using a running stitch, sew the felt to the zipper. Now you should have a nice tube-shaped piece.
5. Flatten the tube, and once more use a running stitch to sew up both sides of the purse. On the second side it is helpful to unzip the zipper to finish.
Hooray! Now you have a cute little coin purse, easily customizable to suit your tastes, or that of a friend's.