The Montessori sensorial materials were designed to develop the child's intellect and reason. They are grouped according to sense, isolate the sense and are grouped from simple to complex and the control of error is the child's eye which allows the child to independently identify and correct mistakes leading to mastery. The developmental aim of all the sensorial materials is exploration and discovery leading the child to develop and refine the ability to observe, compare, differentiate, reason, decide, solve problems, appreciate and participate in the world.
Practical Aim: Discrimination of plane closed figures.
Future: Geometry, Metal Insets. Writing.
Practical Aim: ability to discriminate various three dimensional forms.