"Anything goes... pretty much pen, pencil, brush, feathers, straws, twigs, watercolor, acrylics, glue, crayons, sand, mud, human hair, moss, grease, dirt, mold, macaroni, wood, garbage, bones, and any other debris lying around my studio or outside that I can dig up. 5 When will the Art of Sam Kieth book be out?" . . . . . . . . . . . .