All 1,021 pieces of this kit are the manipulatives you need to explore the properties of color and light while building math, language and science skills at the same time! Our plastic tubs are filled with a huge variety of translucent plastic pieces, from letters and numbers to pattern blocks and color chips. Perfect for practice with everything from counting to creating color combinations, our sets come in a handy metal storage rack that gives children super-easy access to the materials they need! Center includes a 20 5/8" rack and all 8 tubs shown.