Before you color on fabric, be sure to pre wash, as the sizing in the fabric may act as a resist, and prevent the color from being permanent. Also, the result may not be as good as with 100% cotton fabric. I teach a color crayon class,and these are a few of my tips. Also , when washing finished project use mild detergent and cool water.
I also do a lot of machine stitching for embellishment, and it's beautiful. It adds texture, and design to your work. Enjoy.

I did such a quilt with our Sunday School and used pentel dye sticks. They worked really well, and are inexpensive. Here's a pic:

My mom and her sister started a stamped design state flower quilt back in the 1930's that you colored the flowers with regular crayon, ironed the square between two pieces of waxed paper, then hand embroidered the details (outline stitch, french knots, etc.) In the mid 1960's I helped finish this quilt top ...they had only done about 1/2 - 2/3 of the squares, plus I added green sashing...as a home ec project, then a friend of my mom's quilted it. My hubby and I used it until the fabric started wearing thin at the edges...probably at least 15 - 20 years. And the crayon part did fine...actually held up better than the rest of the muslin since it coated it and helped preserve the fibers. I still had it folded over a quilt rack when our house burned several years ago.

i took a class on coloring and was told to use Crayola crayons and once colored take a paper towel and place over the colored area and use an iron this melts away the excess color. I have colored some sunbonne sue blocks.

Yuo can also color over it again if you have already heat set it. It will make the color darker and richer. Just heat set again.

thanks I didn't know that

Hey Pat,
Not sure if this will help. The children colored squares of flags from various countries and another group did sea creatures. They did turn out light but were heat set with the iron and will keep if not bleached or use of harsh detergent. They can be colored over to intensify the color.
Here are pics of 2 I quilted for the school. Both quilts were raffled.

Great topic about using Crayons. I have used reg. Crayons on an applique Basket to shade it but have not laundered it yet. I did heat set it with paper towels under the pc AND over the top as well. Have any of you used: ColoringBookFun.com

They have patterns for almost anything you might want to print off to color. Or use for an applique pattern. It is a lifesaver also for keeping little grands content. LOL