All you need for this idea is duck tape and scissors.
1. Lay two long pieces of duck tape (sticky side up) on a table. Lay one piece little less then half way over the other. (remember still sticky side up...so right now you should have two slightly over lapping pieces)
2. Lay two more pieces (sticky side down) over the other two. (now you should not have any sticky sides showing..front and back should both be smooth) Cut any extra tape off.
3.To make the pocket cut one piece of tape the same size as the wallet then cut another one so it is longer then the wallet itself. Lay the smaller piece on the longer piece in the middle. (so you should have sticky tape showing on both sides)
4. Wrap the long piece of tape around one side of the wallet. (now you should have a pocket with a open bottom)
5. To close to bottom and finish cut another long piece of tape and run it along the bottom of the wallet so that open pocket is now closed.
Note~ the dog thing is fake money we made also using duck tape. We just cut strips of tape then folded them over and cut any extra off.