I have had some of the marking pencisl stay for a while and when washed out with a wet cloth, return after the fab. dries, supposedly wash away markers for sewing and quilting. I am afraid of using crayola markers or any type like that , after teaching first grade for years, and seeing these get on children's and my clothes. Too often the washable markers were really permanent markers I use a lot of yellow school chalk to mark on quilts, isn't sharp for fine lines but will dust off and does wash out.