Here’s a tutorial for making a floor cushion. Try using fabric scraps or orphan blocks! It can be any size, just use the appropriate pillow form. I would probably make a flapped back instead of a zipper, but that’s just me.
The “top” is quilted so you can use leftover batting pieces, too. The batting scraps could be sewn or fused together. Here’s a product to do that with!
And just keep stitchin’