Wooden colour trinomial cube

The trinomial cube is a sensory material that helps the child to become familiar with the three dimensions, as well as with the binomial cube. It is advisable, in fact, to have first practised with the binomial cube, as the trinomial cube increases the degree of difficulty through its three levels. The trinomial cube allows the child to approach algebra in this age group. The
elementary Montessori child uses the Trinomial Cube as an activity of algebraic exploration. Contained in a hinged wooden box with lid.