The close up view of the drawing reveals the hatching and cross-hatching that I wrote about a few posts ago. The technique is a lot like what you get from traditional pastels except that there is no dust.
This is like your traditional kids’ Crayola crayons except with a very rich, heavily pigmented and highly workable texture. As a drawing medium it is extremely responsive and flexible. As a consequence you can fully enter into your idea without any hassle about the medium. And you can find a kid-like joy in this portable, scribbly crayon.
They’re a little on the expensive side, though. If one rolls under the couch, it’s worth diving under there to retrieve it!