homemade watercolor paints, they're solid\nCombine 3 tablespoons each of the baking soda, cornstarch and vinegar and add 1 1/2 teaspoons of the corn syrup/sugar substitute. Allow the fizzing to subside and mix completely. Pour the mixture into whatever you'd like to use to hold your paints. I bought a $2 paint tray at Michaels, but you can also use a plastic egg carton. Add the food coloring to create your desired palette and leave out to harden for three hours. Make sure you add the food coloring relatively quickly; the mixture actually starts to solidify almost right away.