Mystery Bag / Stereognostic Sense

The Mystery Bag develops the stereognostic sense—the ability to identify objects through touch alone, integrating multiple tactile impressions.

• Framework: Montessori
• Unit: Sensorial
• Learning area: Stereognostic Sense
• Level: Ages 3-5

Objectives

• Develop stereognostic sense (shape through touch)
• Integrate tactile information
• Build mental imagery skills
• Prepare for geometry

Materials

• Mystery Bag (opaque cloth bag)
• Small objects or geometric solids
• Matching objects outside bag

Instructions

1. Place familiar objects in bag. 2. Child reaches in, feels one object. 3. 'What is this?' (without looking). 4. Pull out to verify. 5. Progress to geometric solids. 6. Match to objects outside bag.

Educator tip

Start with very familiar objects. Progress to geometric solids and then to similar objects requiring discrimination.

Assessment

Child identifies objects by touch alone with accuracy.

More from Sensorial

• Sorting by Multiple Attributes
• Color Mixing with Droppers
• Sound Matching Bottles
• Pressure Tablets (Baric Sense: Fine Gradations)
• Geometric Solid Matching Cards
• Texture Grading Boards
• Color Gradient Scales
• Musical Instrument Exploration