<p>The Binomial Cube is a concrete representation of the algebraic formula (a+b). The factors of the equation are represented by the cubes and prisms. The elementary Montessori child uses the Binomial Cube as an activity of algebraic exploration. The binomial cube is contained in a wooden box with lid, having two adjacent hinged sides that open out to display the 8 wooden ll. component cubes and prisms painted red, blue, and black. (For age 3-12)</p>