The knobbed cylinders introduce the visual discrimination of size, they refine the child's perception of dimension and prepare for mathematics activities such as comparison, grading and seriation.
The blocks provide a control of error and even a young child can use them successfully.
Set 1: diameter decreases as the height remains constant. Set 2: height and diameter of the cylinders decreases. Set 3: diameter decreases as the height increases. Set 4: height decreases as the diameter remains constant.
