In the Tactile Sense Exercises, the child learns through his sense of touch. “Although the sense of touch is spread throughout the surface of the body, the Exercises given to the children are limited to the tips of the fingers, and particularly, to those of the right hand.” (Montessori, Maria (1997) The Discovery of the Child, Oxford, England: Clio Press) This allows the child to really focus on what he is feeling, through a concentration of a small part of his body.
In the Baric sense Exercises, the child learns to feel the difference of pressure or weight of different objects. This sense is heightened through the use of a blindfold or of closing your eyes.
In the Thermic Sense Exercises, the child works to refine his sense of temperature.
In the Auditory Sense Exercises, the child discriminates between different sounds. In doing these different Exercises, the child will refine and make him more sensitive to the sounds in his environment.
In the Olfactory and Gustatory Sense Exercises, the child is given a key to his smelling and tasting sense. Although not all smells or tastes are given to the child in these Exercises, the child does work to distinguish one smell from another or one taste from another. He can then take these senses, and apply them to other smells or tastes in his environment.
In the Stereognostic Sense Exercises, the child learns to feel objects and make recognitions based on what he feels. “When the hand and arm are moved about an object, an impression of movement is added to that touch. Such an impression is attributed to a special, sixth sense, which is called a muscular sense, and which permits many impressions to be stored in a “muscular memory”, which recalls movements that have been made.” (Montessori, Maria (1997) The Discovery of the Child)