Gel Pen Coloring tips and tricks. 8 fun videos and worksheets to help you learn how to color with your gel pens. Artist Jennifer Stay has come up with new ways to use our gel pens in our coloring books and with our cards and planners. Follow along as she teaches you how to use glycerin to paint and smear beautiful blending effects with gel pens. You will be amazed at what your gel pens can do!