this weekend I bought a notebook and watercolor pens to kill the time when I am in a bus on my way to work. It is Extreme drawing in a shaking bus, our drivers are like nervous ones, but with dope music in earphones this is some kind of fun for me in the mornings. Coloring brush pens are quite expensive, so I choose few colors to try: green for grass and trees, brown for ground and bricks, grey for roads and other. these pens are water based, with dyestuff ink, easy to use, (such a pleasure!), good for illustrators, cartoonist, graphic artists.