This was my first try using paint pens. Played around with shapes to get used to the texture of the paint and how it feels to use the pens. Done in a watercolour sketchbook.
This started as a line drawing based on a photo of peonies in the garden. It’s drawn with three different pens: Micron 005, Micron 03 and Faber Castell Pitt superfine (0.3) on 11x14 Strathmore Bristol Vellum. The paper isn’t terribly tolerant of wet media, so I played around with tinting it in Photoshop because I wasn't sure how it would go. But I liked it in color enough to chance painting the drawing with the nice and bright Dr Ph Martin Hydrus watercolors. It's photographed it on my drafting table with my glasses for scale. The lamp has a daylight bulb, so I think the color (at least where the light is more prominent) is fairly true.
I modified the challenge a wee bit. I didn't use the same paper for the various drawings since I was using (top row, left to right) hard graphite pencils (3H to HB), watercolor pencils, (bottom row, left to right) brush pens and ballpoint pen. These media work best on very different paper textures and moisture absorbing qualities. The second picture shows the object of my study --- and the apparatus I use to hold botanical subjects. "Third hand" tools are very useful and cheap. This one was under $10 and serves my purposes well. Just FYI. (Each drawing/painting was scanned and composited in Photoshop.)