When working with the brown stairs of Montessori children are easily learned to detect the difference in the dimensions of the same geometric shapes. In addition, when ordering the parallelipedes, training the motor of the hands and the ability to grasp different larger objects.
Material of Montessori, which is made of wood.
The set consists of ten brown parallelepipeds. They are of the same length . 20 cm and of different heights. The smallest parallelepipede has a height of the country 1 cm and the largest size of 10 cm, the difference between the heights of two consecutive parallelepipeds is 1 cm.
The activities with this product are suitable for children over 3,5 - 4 years of age. 
