This set contains 100 Unifix Cubes. The cubes firmly lock together and easily come apart. Unifix cubes are a versatile, extensive resource designed to teach early number concepts and skills such as counting, number bonds and number patterns. The cubes are easily manipulated by even the youngest child and fit together and pull apart with ease. The cubes interlock on the top and the bottom, allowing students to create Unifix towers of different lengths. This can be used for counting, addition, subtraction, and even fractions. Also great for patterning and sequencing, multiplication and division, measurement and more.