This one, from FrenchCrawler
And this one, from Robyntheslug
but mine is a completely different creation. More a money clip per se than a wallet, my cassette tape money holder does not involve cloth or sewing of any kind. I'm sure many people have thought of this idea, or may have even made it and I just haven't seen it online yet but if you have any suggestions on how to do this better or hints and tips please comment. (Also, don't forget to rate this instructable!)
The materials needed are on the next page, and are extremely easy to procure.
DISCLAIMER: Don't burn yourself, this instructable uses hot glue. Ask for help from a trusted adult. Do not eat the screws.
Step 1: Materials
@ 1 cassette tape (if you don't have one head to a thrift store to pick one up for under a dollar)
@ 1 hot glue gun (aka Hot Melt) and "ammo"
@ 1 tiny phillips head screwdriver (or, if your cassette doesn't have screws, a flathead for prying it open)
@ 1 tiny hinge (I think mine was brass, it came in a pack of four with screws for $4 US)
If you don't have the hinge or the hot glue gun (heaven forbid the lack of the latter) head down to a hobby shop or hardware store to pick one up.