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Box with Prisms for the Brown Stair

The brown stair is made up of a series of prisms.  Each prism is the same length but changes in width (breadth).


In stock

SKU: CHS0120

In stock


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The Box with Prisms for the Brown Stair contains 10 wooden prisms.  The child uses these to calculate the volume (area) of the prisms of The Brown Stair. The prisms are all identical in length and breadth, but the thickness of each prism differs.  Prisms introduce the concept of comparatives of thickness or thinness and area and volume.


  • 10 Beech wood prisms
  • 1 cm x 1 cm x 1 cm rising by 1cm per prism to –
  • 1 cm x 1 cm x 20 cm

Childrens House has stock of the box with prisms for the brown stair, ready to ship to you.

The Broad Stair by Catherine McTamaney

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 0.52 kg
Dimensions 23.6 × 10.2 × 5.7 cm


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