The Stereognostic Sense

Stephanie Sarvana • November 13, 2023

In Montessori toddler and primary classrooms, we offer specially designed materials to help young children refine their senses. In addition to the five senses—tactile (touch), visual (seeing), auditory (hearing), olfactory (smell), and gustatory (taste)—we also support children’s stereognostic sense. 


What is the stereognostic sense?


The word stereognostic comes from the Greek words “stereo” which means “around” and “gnosis” which means “to know.” Having a stereognostic sense means being able to identify the shape and form of a three-dimensional object, and therefore its identity, through tactile manipulation without any visual or auditory input.


“They are very proud of seeing without eyes, holding out their hands and crying, ‘Here are my eyes!’ ‘I can see with my hands!’”

– Dr. Maria Montessori, The Montessori Method


Children develop a mental picture of an object through the use of touch and movement. This tactile and muscular experience allows them to recognize an object by feeling and palpating without seeing or hearing the object. Everything we touch helps form a memory.


Young children are absorbing everything, so the more experiences they have with objects and parts of their environment, the more accurate their perceptions will be. Thus, the combination of language (naming objects), the tactile experience, and muscular memory provides children with a more complete and precise understanding of the world.


Mystery (or Stereognostic) Bags


In our toddler and primary classrooms, we have special “mystery bags” or “stereognostic bags” to support the development of children’s stereognostic sense. These drawstring bags contain objects children have already encountered in their environment. We make sure children know the names of the objects, too.


The first bag we introduce has a set of four to six objects that belong to a classified group, such as kitchen utensils, art supplies, bathroom items, etc. These are real items that children have used in their lives.


The next bag has four to six general objects that are not grouped in any category (e.g. a comb, rock, sponge, funnel, cloth, etc.).


The third bag has three to four pairs of objects that are very different from each other. 


The Experience


When we introduce each of these bags, we first show how to carry the bag and invite the child to take the bag to a table. We then carefully demonstrate how to open and close the bag and give the child a turn to try opening and closing. Next, we peek inside the bag and remove one item at a time, naming each object as we remove it from the bag and place it on the table. We also give the child a turn to feel each item. When all the objects are removed from the bag and lined up on the table, we name one and invite the child to place it in the bag. We repeat this until all the objects are back in the bag. 


Then the fun begins! We explain that we are going to reach into the bag to find an item. Putting both hands into the bag (and without looking in the bag) we feel around and grasp an object. With some enthusiasm, we say the item’s name before we remove the item. Then we take the item out of the bag and show it to the child. Often the child watching takes great delight in the fact that we were able to name the object before seeing it. We repeat with the other items and then invite the child to try. When using the bag with the paired objects, the only difference is that we select one item, name it, remove it from the bag, and then try to feel for the matching item.


We regularly rotate the items in the bags so children have lots of opportunities to feel for what is in these “mystery bags”. Children find the experience to be absolutely delightful!


The best part is that when children try to recognize an object through touch alone, their brain receives the sensorial input and then forms a three-dimensional image that provides a more complete understanding and precise perception of the object. 


“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.”

– Dr. Maria Montessori, The Discovery of the Child


The stereognostic bags are just one example of the many carefully designed materials we introduce in Montessori classrooms. We always love to have you come visit to see or experience these sensorial delights firsthand. Schedule a tour today!

By Katherin Castro Hoyos, Lead Toddler Guide • October 22, 2026
In the Montessori environment, we talk a lot about independence. But how does independence actually develop? How can we, as adults, support a child on this path? One of the first steps toward independence begins with movement. As the child starts to separate from the caregiver physically —moving, crawling, walking, reaching, and exploring— they begin to discover something profound: I can do things by myself. I can reach for something without being carried there. I can move toward what interests me. I can try. But before children can become independent, they depend on us. And the way we relate to them during this period of dependence makes a difference in their journey toward independence. From Doing For the Child to Doing With the Child At the beginning, especially in a toddler classroom, we do things with the child, not for the child. We guide them through each step. We show them how to push their pants down, where to place the diaper when it is wet, how to get water from the sink into a pitcher and how to pour the water, how to touch others gently, how to ask for a hug, and how to respect and accept it when someone does not want a hug. Sometimes we show them once and sometimes we show them what feels like an innumerable number of times! And then, they start doing it by themselves. Isn't this amazing? This is the growth of independence, and alongside independence grows something equally important: self-confidence. Independence Does Not Mean Doing Everything Alone At the same time, being independent does not mean that we no longer need other people. Human beings are interdependent. We rely on one another, learn from one another, and grow through our relationships with one another. Needing someone does not mean that we are incapable. This is one of the beautiful things about the mixed-age Montessori environment. The teachers are not the only ones showing children how to do things. When a child has mastered a skill, we can invite that child to show another child who has not yet mastered it. “Can you show Eli how to clean his nose?” The child will happily help. In that simple interaction, one child is learning a new skill, while the other is experiencing what it feels like to contribute and share knowledge. Both children are growing. This is interdependence: I can do things for myself, and I can also be part of something bigger than myself. Let Them Struggle If we want independence to develop, the child needs opportunities to struggle. Let them struggle when they are trying to put on their socks. Let them attempt to pour the water even when some of it spills. This can be difficult for us as adults because sometimes it is much easier and faster to simply do it for them. We can see the sock is inside out and we know exactly what needs to happen next. But if we always step in before the child has had the opportunity to try, we may unintentionally communicate: You need me to do this for you. Instead, we can practice patience, staying close, observing and offering just enough help for the child to continue. This does not mean leaving a child alone with frustration. It means staying with them without taking over. Sometimes the right amount of help might be showing the movement slowly. We can exaggerate the movement so the child can clearly observe it and begin to internalize it. Sometimes it might be holding the sock open while allowing the child to put their foot inside. Sometimes it might simply be saying, “You can do it. Keep trying.” The Gift of Trying Again Frustration is not necessarily something we need to rescue children from. It is a feeling they can experience, move through, and learn from —with the presence of a supportive adult. When we allow children to experience the difficulty of something while communicating, “I know you can do this”, we give them an opportunity to discover their own competence. And when they finally succeed, no one can take that experience away from them. They have learned something much bigger than how to put on a sock. They have learned: Something can be hard, and I can keep trying. I can ask for help when I need it. I can try again. These experiences become part of the child's developing sense of self. They begin to internalize a sense of competence that will stay with them long after the sock. Independence comes through interdependence, and the beauty of childhood —and of being human— is found in this ongoing dance of holding and letting go, over and over again.
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