All the manipulatives you need to explore the properties of color & light while building math, language and science skills at the same time! Our 3" x 4 1/2" plastic tubs are filled with a huge variety of translucent plastic pieces—from letters & numbers to pattern blocks & 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! 20 5/8" rack includes all 8 tubs shown—for over 1,000 pieces! Each tub of manipulatives is also available separately