Artist Diem Chau usually works in porcelain, but she sometimes steps it up and uses crayons as her medium. This post has lots of photos showing her carvings of the 12 symbols of the Chinese zodiac. They're on exhibit at the Packer Schopf Gallery in Chicago. My favorite is the rat.
Diem Chau's crayons carved as the 12 symbols of the Chinese zodiac (Thanks, Robert!)