I've become addicted to doing doodle art, tangles, "Zentangles" or other names. It is a meditative way of doodling that is somewhat planned.
Some I do freehand and others from templates supplied by Ben Kwok on the Facebook group "Ornation Creation." There are many books, blogs and Web sites that show how to do this. The great thing is all you need is a felt tip pen and some paper.
Once you get the hang of it you can add color with colored pencils or whatever else you have at hand.
Here's my turkey from a Ben Kwok template. You can see Ben's unbelievable work at: http://www.bioworkz.com/Ben