Use poster paint to decorate paper or cardboard surfaces, such as banners, posters and appliance box play houses for children. Preschoolers enjoy finger painting with poster paints, and adults appreciate their washable nature.
Poster paints are bright and non-toxic, so they work well for face painting and tinting human hair and animal fur. Homemade poster paints can be crafted by slowly adding 1/4 cup of flour to 1 cup of water and blending them in a small saucepan. Stir constantly while cooking the mixture over medium heat until a thickened paste appears. Remove and cool the mixture. Pour 1/4 cup of paste into a baby food jar plus 2 tablespoons of water for each color. Add 3 tablespoons of powder paint purchased from a store that sells craft materials. Mix thoroughly, and add 1/2 teaspoon of water intermittently if the paint seems too dry. Adding 1/2 teaspoon of clear liquid detergent to each jar creates a glossy finish. Add 1/2 teaspoon liquid laundry starch for an opaque look.
Since all other colors can be achieved by mixing various combinations of red, blue and yellow, starting with those primary colors is recommended. Use small amounts of white and black to achieve lighter or darker shades.