The Three Cylinder Blocks (SKU: A023) extend the classic Cylinder Block work by presenting three distinct series that challenge children to compare and match cylinders across multiple dimensions simultaneously, deepening the visual discrimination skills first introduced in the primary Sensorial sequence. This material supports upper Casa children who have already mastered the individual Cylinder Blocks and are ready for more complex relational thinking. It's a reliable bridge toward early mathematical abstraction and an excellent prepared environment addition for classrooms with a strong sensorial progression.