I tried to launch a Kickstarter for a project called CoinCard. Basically it's a leather, credit card sized holder for coins where each coin slips into a perfectly sized slot for that coin. I still use one the prototypes in my wallet today. I learned a ton about leather and manufacturing, a bit about videography, and what it takes to launch a kickstarter (much more than you think). Ultimately not enough people wanted one, though a few begged me to make them one at any price.

I still think a large manufacturer of wallets could easily popularize this as a standard wallet insert, but so few leather manufacturers are in the US anymore I couldn't even contact them to give away the idea.