Broad Stair

These are ten hardwood prisms painted in brown lacquer. Maintaining a constant length the prisms increase in width by 1cm increments. These prisms develop visual and muscular perception of dimension. Working with these materials prepares the child to understand mathematical concepts in plane geometry, area and volume. (1 x 1 x 20cm to 10 x 10 x 20cm). Includes spare 1 cm prism