I found this cute jean waistband ottoman on pintrest--followed the link to Nordstrom's of all places! But I think this would be a fun thing to do for my boys. Not sure how comfortable a metal button pillow would be, so jury is still out on that one.
More time on pintrest also brought up this denim waistband American Flag. So cool!
So, I am no longer going to throw out my pile of "leftovers." I've cut off the seams and thrown those away. But I've bagged the rest for a future waistband project.