The Arch (Wooden Material)

This material consists of 10 wooden arch-shaped blocks, each one varying slightly in width and curvature to form a complete semicircular arch when arranged correctly. The blocks are graduated in size and must be placed in sequence to successfully build the arch structure. This challenges the child's ability to judge sizes, match shapes, and refine hand-eye coordination.

• Largest block (base of the arch): approximately 20 cm wide and 4 cm thick

• Smallest block (top center keystone): approximately 4 cm wide and 4 cm thick

• Height of assembled arch: roughly 12–15 cm