Trinomial Cube bead-stairs A small wooden box contains

A small wooden box contains ten wooden plane figures and three wooden stands for the curved solids

as seen in the second photo:

and Russian

This set consists of a wooden block with five differently sized threaded nuts affixed inside

Trinomial Cube bead-stairs A small wooden box contains27 painted wooden prisms in a wooden box with a lid. The box is hinged and opens out to display the cubes. The lid and sides of the box are printed with the trinomial square pattern. The purpose of this product is to provide the child with tangible experience of the way in which the cube can be divided and subdivided. It also lays the foundations for the later study of algebra. Features Cube dimensions: 9 cm x 9 cm x 9 cm. Box dimensions: 11. 3 cm x