Sensorial
Cylinder blocks, pink tower, brown stair, color tablets, and the geometry cabinet -- refining each sense through carefully graded, self-correcting materials.
Visual Sense
Cylinder blocks, pink tower, brown stair, red rods, color tablets, geometry cabinet, and botany cabinet -- discrimination of size, form, and color.
Tactile Sense
Rough and smooth boards, touch tablets, fabric boxes, thermic bottles and tablets, baric tablets -- refining the sense of touch.
Gustatory Sense
Tasting bottles -- developing the ability to distinguish sweet, salty, sour, and bitter.
Olfactory Sense
Smelling bottles -- training the nose to distinguish and classify scents.
Auditory Sense
Sound cylinders and bells -- training the ear to distinguish pitch, volume, and timbre.
Stereognostic Activities
Geometric solids, sorting exercises, and the mystery bag -- identifying objects through touch alone.
Mixed Impressions
Binomial and trinomial cubes, constructive triangles, knobless cylinders, and the sensorial decanomial -- combining multiple visual discriminations.