When I first posted the outline of these ferns, a reader, Sharon, suggested in her comment to fill in just the background. I was going to fill in the stems and leaves, but her idea was intriguing. I had thought of using watercolor with a brush, or watercolor pencils, or even just colored pencils. Instead, I thought brush pens (like Tombow, but not Tombow) might work. So, I ordered them from Amazon. Fun to use, and a lot of colors! And a great excuse to buy some art supplies, don’t you think? I rather like the results. Thanks, Sharon!