Sewing Kit from Business Cards

My job title at work recently changed so now I have a whole new stack of 500 business cards while I've hardly made a dent on my old stack. In trying to think of ways to make use of these cards, here are a few things that I came up with...

A little envelope for a threader




A matchbook for keeping pins

A larger sewing kit that holds more pins

To make the slit, punch two holes with a hole puncher and use scissors to cut out a long strip from one hole to the other. When it's all assembled, the card that holds the pins can also taped down to make a pocket to store other essentials.