This non-toxic, vibrant paint is completely washable. The watersoluble tube colors can be applied in thick or thin layers on a wide variety of surfaces, including paper, hardboard, plastic, wood and metal. They are opaque to semi-opaque when applied directly from the tube. When thinned with water, they become transparent for watercolor effects. These versatile, easy-to-use paints are comprised of traditional fine art colors, making them an excellent choice for color theory instruction and other educational purposes. Comes with brush.