We were given a set of four regular-sized quilted pillow shams which I thought were beautiful, but we didn't have the matching comforter, or anything that would look good with them, so they sat in storage for a year or two.
I decided to use all four of them to make a sleeping bag for my son- they were the perfect size. I sewed the openings in the back closed (the ones where you put the pillow through) on the two shams that would be on the bottom. Then I just sewed straight lines to attach all four shams. I left the sides unsewn for the top 1/4 on both sides so the flap could be folded down, and I also left one side unsewn about half of the way down so I could attach velcro for easier climbing in and out.
You may have to look closely to see the velcro:
Since my son is still so small, and he doesn't need much leg room, I attached velcro to the bottom corners and up near the top, underneath the flap, so the bottom would stay folded up, thereby giving extra warmth on top or cushioning on bottom.
No need to add lining to this one- we'll just be using it indoors and it is already quilted. If you wanted to make a warmer one, you could just cut your batting to the same size, as well as some flannel or other liner fabric, and sandwich everything together before sewing the whole thing. There are actually tons of ways you could modify this idea for your own use. I mentioned that I didn't sew the pillow openings closed on the top two shams- that makes it so I could slide a small pillow inside and it would stay in place. Also, I could roll the whole thing up, and tuck it into one of those little pockets. Handy!
