The Montessori guide presents activities with materials isolating a particular sensorial property. The children match, grade, order, or explore by tasting, smelling, touching, listening, or seeing. Through repeating these exercises at will, the children clarify their impressions and refine their senses. Individual parts of materials are related to the classroom at large and discreet sensorial elements are identified in the environment through games. The foundation for cultural subjects is laid with sensorial activities.