Why Are Montessori’s Sensorial Materials Important for Children? Great question! We all recognize those beautiful wooden prisms and the pink tower of cubes as being Montessori’s distinct materials for children’s development. The glossy red rods and the blocks with rows of tiny wooden knobs are intriguing. They seem to call out to be touched and handled. But there is so much more to this special set of 25 Sensorial Materials than their beauty; they are instrumental to children’s individualized educations, as students and as human beings.