1st Cylinder Of Block No. 1 (GAM)

The 1st Cylinder of Block No. 1 replaces one lost or damaged cylinder in the first cylinder block, the block in which height and diameter grow together. That block only works when every socket has its own cylinder; with one piece missing the material loses its built in control and goes out of use. A single replacement keeps a classroom set complete instead of forcing the purchase of a whole new block. For children from three years working with sensorial material.