Fill the pan with a small amount of water. Pick 2 colors like purple and Teal. Pick up each square of chalk and scrape some of the chalk dust (with the knife) into the water. Swirl the chalk using the toothpick. Carefully lay the cardstock on top of the water and lift. The card will pick up the chalk and look marbled! Re-scrape and do it again. Allow paper to dry completely. You can use your heat tool to speed up the drying process.

For information on related topics see:
Tips & Techniques: Chalks, Chalk Embossing
Product Reviews: Chalks