What can you do with plastic bags? One idea is to fuse them into a stronger plastic. Cut off the handles and the seam at the bottom of a bag, flatten it out, fold it up to 8-ply, sandwich it between pieces of paper (they use wax paper in this video, I used parchment paper) and iron it with a medium-heat iron for about 20-30 seconds, moving the iron continuously. The new thicker plastic can then be sewn up as you like to make something new. In this video, they show you how to make a laptop case. To skip the goofy parts and get to the project, start at minute 1:00.
I tried this for the first time today and haven't made anything with my fused pieces yet but will post when I do. I would love to see comments if you have tried this or links to your finished projects!