I tried the marbling today! I had my 9 yr old DS experiment with me..he was only too glad to help..he is grounded to the house until tomorrow... lol...I let him scrape it and swirl it. Some of it turned out really cool, and I noticed better results on the cardstock that wasn't as smooth as others, and I also tried using an off white and cream colored paper. We broke some of the chalk squares, so I might eventually go and buy another set..one to use for marbling and other to use for chalking pages. They are drying now on my cooling screen racks I use for cakes, and I can't wait to use them ! Thanks for the idea for something different to try! It was fun! Linda C