The Trinomial Cube Montessori material is a dissected wooden cube made up of twenty-seven smaller painted cubes and prisms. It includes a box with two hinged sides and a lid with the finished pattern silk-screened on top. When assembled correctly, the cube should have the same finished pattern on all sides. A fun and challenging exercise in spatial reasoning and cognition, and a classic piece of Montessori equipment for the classroom or home. Makes a great companion to the Binomial Cube, the Power of Two Cube and the Power of Three Cube.