The wooden box with 9 compartments and lid contains 20 bead stairs 1-9. The beads have a diameter of 8 mm and are micro lathed and varnished in Italy and thread on stainless steel wire by hand. The wooden box has a UNI EN 71-3 finishing.
BEAD BOX FOR BIG NUMBERS CHECKERBOARD
The material is to be used together with the checkerboard (MA20) and the number stamps (MA20-A) to make multiplications with big numbers and to make a geometric analysis of the multiplication.