Quality Montessori Materials for Toddler,
Primary and Elementary Environments.
E&O Montessori USA.
The broad stair (also called Brown Stair) is designed to teach the concepts of "thick" and "thin". It comprises ten sets of wooden prisms with a natural or brown stain finish. When put together from thickest to thinnest, they make an even staircase. As an extension, the broad stairs are often used with the pink tower to allow the child to make many designs