Take 2 Tablespoons of all-purpose flour, 2 Tablespoons of salt and 2 Tablespoons of water. Add some drops of food coloring until you reach the color that you want. Then carefully pour the mixture into a plastic squeeze bottle, found in many different stores.
Try getting ones with different squeeze hole openings for different colors. Then let your kids squirt out their artistic designs onto paper, cardboard, oaktag or even wood. Soon the paint will dry and the paint will become puffy. Your kids will love it!