You will need:
earth colours (ochres, umbers and sienna) and pastel colours
whole milk, 1 cup
pipette / medicine dropper
water and detergent to clean equipment and brushes
Place 1 teaspoon pigment in the saucer and add milk with the pipette. Stir the mixture to a paste. The paint is now ready for use.
These pigments are not irritating, nor are they hazardous. Please ensure they are only used for painting. The paint will not go sour after it has dried. Have fun making pastels and pavement chalk too.