Underglaze pencils, chalks/crayons, and watercolors (in semi-moist pans and tubes) expand your abilities to cross-over from a 2D artist to a 3D artist by turning clay into your canvas in a smooth transistion because you're using a medium similar to something you're already familiar with.

Pink, maroon, Peach, Rose, and Yellow all hold color up to Cone 6. All other colors may be fired to Cone 10.