GAM Brown Stair

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.

The purpose of the Brown Stair is educates the hand to perceive differences in size, shape and weight. Develops visual discrimination of size in three dimensions. Indirectkly prepares the child for mathematical concepts in plane geometry, area and volume.

Control of error: the child can usually see if the stair has been badly built.