ETA hand2mind 3/4-Inch Multi-Colored Linking UniLink Cubes (Set of 500) 3/4-inch durable plastic interlocking cubes Cubes are easy to put together and pull apart Perfect math manipulative for counting, addition, subtraction, patterns and color recognition Set contains 10 colors: red, white, blue, yellow, green, black, orange, purple, brown, and light green Ideal for ages 4+