I've made two baby quilts using crayons. First I traced my SunBonnet Sues onto muslin squares (one for each month) and then just colored them. The second quilt was a little boy quilt with cars, tractors, etc. I outline embroideried then colored inside the lines. Heat set. Done. I also colored some hand embroidery on a set of pillow cases and they have held up well in he wash. If you iron freezer paper on the back of your block it makes it easier to color.