Trinomial Cubes

The Trinomial cube comes in after the child is introduced to the Binomial cube. This again is a perfectly fitting example of a child’s learning in concrete before going for abstract concepts. The trinomial cube is a concrete representation of the algebraic formula (a +b +c)3.The trinomial cube is contained in a wooden box with a lid, having two adjacent hinged sides that open out to display the 27 wooden component cubes and prisms painted red, blue, yellow, and black.