I've made one! They're fun. If I remember right, you cut the top square 1/2" bigger than the bottom. (5" bottom square, 5 1/2" top square". The top would be the "good" fabric, the bottom is okay to use cheap muslim. You do a pleat in the middle of three sides, and sew the squares, wrong sides together, leaving open the 4th side. I did all 140 or so squares and tossed them in a sack. At night, while watching tv, I'd fill those squares with polyester fiberfill (like what you use for stuffing toys). Then sew up the 5th side. Sew the blocks together so the seam is to the back. Then I sewed it to a backing (no batting). I then tied the front blocks to the backing.