I have used the new Crayola washables and they all came out. Marked with the Green and Blue. I also use Washable Colored pencils and use the crayons that come in the plastic tubes and you turn the bottom to pull it up. I don't spend big money on those special pens, I 've not had any problems with any of them. I have a large basket with all the crayons, pencils, etc. I just try not to use the reds too much.