Twinkling H2O’s Starter Kit. Twinkling H2O’s are luscious watercolor cakes. They are incredibly shimmery; non-toxic; and acid free. Just spritz cake with water to activate the paint. Apply with a paintbrush; sponge or other painting tool. For use on paper; canvas; gesso boards; chipboard; wood and more! This starter kit contains six 0.176 ounce colours.