Well, if you crochet, it is about time that you do. This is tutorial on how to make plastic yarn, or plarn, from plastic shopping bags from Petals to Picots. Then, once you have master making plarn, it's really easy looking, you can venture out to crocheting with it! Petals to Picots also has a tutorial on how to make a reuseable shopping bag. Gotta love that upcycling! Get the details from Petals to Picots.