The new GAM (Gonzagarredi) materials are identical to the original GAM materials.
The GAM materials are very well made and generally have a satin finish. All products are approved by AMI (association Montessori International)
This series of prisms demonstrates to the child the change in width (breadth), while the length remains constant. Practice with The Brown Stair indirectly prepares the child for concepts in plane geometry, area and volume. The prisms are crafted in precise progressions from 1x1x20 cm to 10x10x20 cm.
