I used one of my practise FMQ pieces as a cover on a heating pad that is just too hot on the lowest setting. I just stitched another piece on three side so it is like a small pillow case. I used a piece of an old heavy woolen skirt to make a pad for under my sewing machine. It is much quieter with the pad. One or two layers of batting would work as well. If you don't want to deal with them what about putting out an advertisement -I think you would find that someone would be happy to have them. It seems a shame to put them in the landfill.