Unifix Cubes, set of 100

5 yrs. & up. Specifically designed for young children, Unifix® cubes join smoothly and securely with a unique one-way connection that provides a realistic and accurate hands-on model of our unit-based, linear numbers system. Used in thousands of classrooms, Unifix® is the premier math manipulative for young children. Set of 500, 50 of each color.