Teach color sorting skills in an easy way with this fun activity. Add it to your teaching school supplies for preschool, kindergarten and first grade students - they'll learn to recognize colors and to describe the world around them. Durable, sturdy and perfect for aiding children in learning, this set will last. Includes forty-eight 5.08cm cards (6 for each color) and eight 8.26cm x 8.26cm x 8.26cm sorting boxes. Cardboard. (56 pcs. per unit)