Maria Montessori has created a special material to learn colors and to train the perception of the difference between the different shades: the color spools, so called because they recall the ancient wooden objects around which the threads of fabric were wrapped. The color fuzes introduce the final stage of color discrimination, that of gradation. Contains 63 tablets, representing 9 colors in 7 color gradations: red, blue, yellow, green, purple, orange, brown, pink and gray. MINIMUM QUANTITY: 3 SETS