Some techniques starting with the letter C are Crimping, Carving, Caught in Crystal, Cracked Glass, Credit Card Backgrounds, Crayon Resist, Collage, Chalks and Watermark/Versamark ink, Cosmos Paper and Colorwash techniques. I decided to make a fun Birthday Card with the Crayon Resist technique. Which I have played with before, it is also called Resist with Crayons.
Stamped candles with black Archival ink and heat set on glossy paper. Colored in the candles with white crayon, the flames with orange & red crayons and wrote the word "Brilliant" with a yellow crayon.
Covered the card with Rainbow ink with a brayer, wiped off the ink over the crayon colored areas.