Teach sorting, patterns, size comparison and other early math skills with these durable plastic blocks. Each 60-piece set includes 5 shapes, 2 sizes, 2 thicknesses and 3 colors. Shapes in the Desk Set measure 10 cm2–30 cm2. Sets come in a handy storage tray with shape sorter that can also be used for tracing. Activity Guide included. • Grades PreK-6