Several evenings of doodling a floral background turns into a "double-doodle" when you break out watercolors and "paint by number" to fill in the doodle. Make sure to use micron pens so the ink doesn't run when you add watercolor. This a great mindless exercise when you feel like doing art buy you're not feeling (a) particularly creative; (b) don't have much time; (c) you need a simple setup/no fuss for portable art. It is easy to start & stop; and start again.