The black and white bead stairs (like in MA25) are placed in a small wooden box with lid. The stairs are also available without box. The beads have a diameter of 8 mm and are micro lathed and varnished in Italy and thread on stainless steel wire by hand.
BLACK AND WHITE BEAD STAIRS FOR ADDITION (WITHOUT BOX)
This material can be used from the age of 4 onwards when the child knows the the golden bar of tens, the numbers 1 to 10 and the coloured bead bars. To be used with the positive snake game, first and second level. The goal of this material is to facilitate the construction of the mental calculating mechanism by using the 10.