Montessori Knobless Cylinders involving Sorting, Comparison, Grading.
Four boxes each with a set of 10 cylinders of the same size as the cylinder blocks:
- One set of red: two different dimensions.
- One set of yellow: three different dimensions.
- One set of green: three different dimensions – inverse to the first.
- One set of blue: one different dimension.
- One set of red: two different dimensions.
- One set of yellow: three different dimensions.
- One set of green: three different dimensions – inverse to the first.
- One set of blue: one different dimension.
The knobless cylinders are parts of the sensorial curriculum and they refine visual distinction between the heights and diameters of three-dimensional forms.