I've been wanting to do a Saturn-style ringed gas giant for a while. At first I was thinking charcoal, but in the end I did it with watercolor pencils. The rings didn't come out as smooth as I would like, but I'm very happy with the planet itself:
And that reminded me of the Rinchies my friend Alex got me. Little cardboard discs with a drawing-appropriate surface. So I did some tiny planets:
And I like those so much I might start doing them as a warm-up for art and/or regular practice.
Also, bubbling away in my head is a div system using Rinchies,with or without planets.