I only used crayola crayons to color on 100% white cotton, and washed the cotton before applying the coloring, to remove the sizing from the fabric, then pressed with a steam machine/iron before using the crayons. I purchased a round box of crayons with 92 colors and a sharpener which came as part of the crayon box. Once I applied the crayon colors, I heat set the quilt pieces using a hot iron and papertowel on top of the colored cotton to pick up any excess crayons - then I like to add some outline detail and I used Derwent Pencil crayons for this purpose and also heat set them once I finished utilizing the same method.
No one I have given these quilts to have told me they faded, or lost some of their color. I had my granddaughter's class each color an owl picture for each of their two teachers some years ago, and they said they are just as the day they received them.[ATTACH=CONFIG]602702[/ATTACH]