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.