ETA hand2mind Linking Pop Cubes, Educational Counting Math Toy (Set of 1000) Pop Cubes are designed to be durable and easy to connect and pull apart Cubes connect on all six sides to build up or out Keep kids busy with unlimited ideas for creating creatures and building structures Great learning tool for investigating patterns, numbers, measurement, area, volume, graphing, and geometry Each cube measures 2-cm and can be easily cleaned All sets contain 10 vibrant colors: brown, black, red, pink, orange, lime green, yellow, blue, white, green Recommended for ages 3 and up