I have no idea how to sew, I just kinda did this. (Obviously, haha.) I used one large piece of canvas for the bag part, and another long piece for the strap. I glued pieces down before sewing them with embroidery string and tapestry needles. I ended up breaking all 6 needles from the package– at that point I decided I was done! I did everything and then turned it inside out when I was done.
update: bear stamps on one side!