• Each cylinder slides effortlessly yet precisely into its well, giving the child an enormous sense of satisfaction.
  • Set 1: height and diameter of the cylinders decreases.
  • Set 2: diameter decreases as the height increases.
  • Set 3: diameter decreases as the height remains constant.
  • Set 4: height decreases as the diameter remains constant.
  • 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.
  • The child initially works on one block at a time, later the sets are combined and the interrelationships in size are experienced.
  • ELG: Use language such as ‘greater’, ‘smaller’, ‘heavier’, or ‘lighter’ to compare quantities. Use language such as ‘circle’ or ‘bigger’ to describe the shape and size of solids and flat shapes.