ETA hand2mind Yellow Plastic Base Ten Blocks, Starter Set (Set of 161) Master the fundamentals of place value and regrouping with this base ten set of units, rods, flats, and more Durable plastic can be washed and used for multiple years Enough materials for 5-6 students Set includes 100 Units, 50 Rods, 10 Flats, 1 Cube, Activity Book, and storage container Grades 3-6