ETA hand2mind Foam, Assorted Colors, Square Tile Counters for Math Patterns, Counting with Storage Tub (Pack of 400) Explore numbers, patterns, measurement, grouping, and more with this set of colorful tiles Tiles can supplement lessons in counting, addition, subtraction, grouping, pattern matching, and more Made of soft foam, these tiles don't make noise! Tiles measure 1-inch square Includes 400 tiles in 4 colors (red, blue, yellow and green), packed in a convenient storage bin