The shoelace rug is a "happenstantial multiple" (we love that) created by Nate Silverstein and Andrea Paustenbaugh. It moves beneath your feat, creating an ever-changing sculpture that's surprisingly comfortable and engaging. Custom versions are available, but the standard black+white versions start out at 1 meter by 2 meters, and 2 meters by 3 meters. And it's machine washable.
How many laces are in each? Well, we need to finish counting the jelly bean jar first!