3M themselves have a web page (on their Canadian site) dedicated to providing a detailed description of how to make a men's wallet using nothing but a roll of Scotch® Duct Tape, a utility knife, a ruler and background music (optional).

"Most people agree that Duct Tape can save you money on costly repair bills but did you know that you could create a wallet to hold all of the money you’ve saved? It’s not as difficult as it sounds and in just a few simple steps, you could be the proud owner of this year’s most important fashion statement ('Duct Tape is my life')."

So, there's a good way to burn away a rainy weekend afternoon with the kids.