Yes! I've read the Crayola Washable Markers are good to use. I've already purchased a pack, but haven't used them yet. They do say to test first all the colors you think you may use. However, I have heard one color doesn't wash out too well on all fabrics, and I believe that's yellow. So test it if you decide to use it, first.
Personally, I've always used the Blue Washout Markers you get at JoAnn's, Hancocks and the LQS. I've had no problems whatsoever. They've been good to me :)
Hope this helps!
Debbie in Austin