Color in the Primary Montessori Casa, or classroom for three to six year olds, is more about perception and discrimination of a sampling of primary, secondary, and tertiary colors, and their tints and shades rather than color theory and the color wheel. Children are introduced to three sets of Color Tablet Boxes containing an assortment of colors to recognize, sort, match in pairs, and grade from dark to light, which develop the chromatic and aesthetic senses in preparation for exercises in creative art or "Expression." Written and illustrated by AMI Diploma holder Mary Da Prato, My First Montessori Book of Colors reinforces classwork and helps parents guide their child to the wonder of color and self-discovery.