I found an extra 20 inch zipper in the sewing table and I used some 5/8" ribbon I had laying around. I didn't line it because I didn't realize how much sewing was going to be involved. At first I started using the sewing machine....yeah, that's not what the lady intended. I ending up breaking a few needles and getting super frustrated. I eventually ditched the machine and sewed the rest up by hand. Then I discovered what a zipper foot was after I was finished. Go figure. I still don't know if I even have a zipper foot and how it works but I think it might have been easier.
This is what it looks like unzipped:
At first, I was reading the tutorial and thinking, "How the?....What?...There's no what it does that..."
It ending up costing me nothing and I completed it during Oliver's nap. All in all, a success. And now I have a coin purse. And I learned a little bit about sewing zippers. If you're planning to make one, I recommend reading through the steps several times to get a feel for what's coming up and where not to sew right away and where to place things.
Time: 30 minutes give or take.