Perfect for counting, measuring and patterning. Set of 500 plastic one-centimeter cubes in 10 colors comes in a convenient storage tub with Activity Guide. Ages 6 to 8. Developmental Skills: Counting, Fine Motor, Equivalency, Comparisons, Math Concepts, Visual Attention, Problem Solving, Visual Processing, Attention to Detail, Sequential Thought, Size Discrimination, Memory and Recall, Spatial Relationships.