Sensorial activities focus on the development of sensory perception. Materials are designed to isolate one defining quality such as color, weight, shape, texture, size, smell, and sound. For example, the activity the Pink Tower compares the visual quantities of large and small. Concepts include: Geometric Solids (shapes), Red Rods (size), Knobbed and Knobbles Cylinders (gradation), Pink Tower (gradation), Color Box 3 (color intensities) Thermic Bottles (hot /cold) Mystery Bag, and Sound Cylinder.
Sensorial materials also equip the child with the ability to comprehend abstract mathematical concepts like geometry and algebra.