My grandkids had a lot of fun using these. We just took regular coloring sheets and colored them in with these glitter tubes. They have fine points on them so it makes it easy to color in the lines. They do stay wet for quite a while, so we had to be careful not to smear them. We also used them to accent some sheets that were already colored with marker. I don't know how they would work over crayon because of the wax, but over marker worked fine. They all gave these glue tubes a thumbs way up!