So, this definitely isn't going to be our final logo/business card/price tag, but I just love it, so I'm going to post it, anyway.
Why do I love it so much? Because I glued actual string to a cardboard box, took a photo of it, worked a little photoshop magic, and voila! Unfortunately, it looks way better digital than printed, so it's not as versatile as it needs to be for the long run. It works for us now, though!