I have made mine into a pendant with one of my hand-made clay beads on the top - all it needs is something threading though and it can be worn.
I decided to put it on a card so I mounted it on white, then black and then white again. The last layer of white I did some more zentangling on and then thought I would mount that on black and do even more but this time using a white pen. Now I wish I had put a plain layer between the two zentangled bits. My best white pen is a Signo so I used that. It does come out thicker than my black pen but it looks sort of ok'ish.
I first was alerted to zentangling at CHA in January as Design Originals had previews of some books on it, I thought it looked easy and didn't need a book. Wrong! I found it difficult when I came to do it. We all doodle and draw flowing lines and things but when it came to creating my domino, and subsequent paper bits, I had difficulty.
Mind you if you go over to Lots to Do and see some of the work posted on there by others you will see why I had a problem. Some absolutely fab pieces on there.
Anyway, here is mine (enough blabbering) - the idea was there even if the execution wasn't.
Sorry about the angle and the flash on top of the domino but it was the best of a zillion photographs I tried to take.