Purple Layer Cake - Moist White Cake mixes, batter mixed up as directed, 2 containers Betty Crocker Whipped White frosting, purple food coloring (I used "neon" purple from McCormick) See procedure: rock-ur-party.
These are dried out water-based markers. Turn them into liquid watercolor paint. Fill a clean baby food jar with water, tie about six dry markers with a rubber band, and set them in the top of the jar. I let them sit over night and watercolor is made!