Waaaay back in high school I bought a Russian textbook at a used bookstore. I never really got around to reading through it, but it kept sitting on the bookshelf.
Lately I've been using the pages from it to create these portraits on. I sketch out a rough idea of the form, gesso over that a bit, then add colored pencil and watercolor on top. The pages are pretty thin and can't take too much unfortunately, but they're fun to work on.