Quilter's cotton doesn't fray very well, and homespun doesn't usually have the cute designs you want. I usually add corduroy to my rag quilts. I use 3 layers of flannel, all 3 cut to the same size, and no batting, so there's no need to sew X's in the squares. All 3 layers are caught in the seams, so there's nothing to bunch up, and the 3 layers provide more fraying. Remember to make your seam allowances bigger - at least 1/2 inch.