Historically, crazy quilts were meant soley for decorative purposes. They were made with scraps of silk, velvet, wool, etc. Many times when a fancy dress or jacket was no longer wearable, the fabrics from the garment were used for crazy quilts, table mats, etc. The scraps were usually sewn to a muslin backing (no batting) and scraps were added willy-nilly to the muslin as they became available. Thus, the name "Crazy Quilt". There was no set pattern to follow. They were usually embellished with beautiful hand embroidery using silk floss. So, if you are looking to make a purely decorative piece, use whatever fabrics you like or have. If you are going to use this as a utilitarian quilt, you need to use washable fabrics etc. Sorry to have taken up so much space, just thought you might like to have some of the history. Good Luck!