I use to make these all the time when I fostered. I used whatever batting I had left over and then found mattress covers at a yard sale. I cut those up to use for the inside. I used scraps of what ever fabric I had just sewed all three layers together and turned and stitched around the edges and then cross hatched. Washable , used up scraps etc. It never took very long to do and it was good for cleaning out scraps of things and for days when I needed something mindless to do.