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The Brown Stair

By practicing with the Brown Stair the child is preparing the mathematical concepts of plane geometry, area and volume.


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SKU: CHS0001


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The Brown Stair also called the Broad Stair, introduces the Child to differences in size, in 2-dimensions.

This is a set of 10 prisms with a constant length of 20cm.  Each prism differs by thickness.  The objective is for the Child to place the blocks in proper gradation, forming a stair-like structure.

“With this exercise the teacher introduces the concepts of thickness and thinness, using the terms thick, thicker, thickest, and thin, thinner, thinnest, with the corresponding blocks as concrete examples.”  A Parents’ Guide to the Montessori Classroom by Aline D. Wolf.


  • made from solid Beech wood in brown lacquer
  • didactically accurate measurements
  • 1cm x 1cm x 20cm rising in 1cm gradations to –
  • 10cm x 10cm x 20cm

The pink tower cubes shown in the brown stair illustration are for illustrative purposes only.

Broad Stair by Catherine McTamaney

The Broad (Brown) Stair

One of our favorites, the Broad Stair or Brown Stair is a constant attraction in the Montessori classroom. A frequent partner to the Pink Tower, the Broad Stair shares some qualities in common with its upright partner: dimensions in diminishing tenths that support the…

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Additional information

Weight 5.8 kg
Dimensions 22.5 × 8.8 × 4.5 cm


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