I came across zentangling about a month ago, and was inspired with the beauty of it!
While it is traditionally done in black and white, I am more drawn (pun intended!)
to the colourful ones.
It is has a meditative quality to it, taking on a free flowing form of its own.
I don't know that one can plan a zentangle, it just happens.
Have you tried it? Let me know what you thought.