I have been working on doodle designs several of my 5th grade classes recently. We have looked at how patterns from doodles can connect to make more complicated designs. This is very similar to the art of Zentangle. A zentangle is a design that is created through steps and helps you relax. You can learn more about these here.
Next, I started adding different patterns within the shapes.
After filling in all of the spaces, I traced over my patterns with Sharpie marker, and erased. I love how complex the design turned out, and the contrast between curved lines and straight lines. You could add color if you would like, but I think the black and white look nice together!