Vintage Style Wooden Abacus 13.9" - Professional 17 Column Soroban Calculator With Reset ButtonDo the math with this classic vintage style wooden abacus featuring 17 columns (17 digits) and a well crafted wooden frame. Timeless Reliability: A calculator in its classical form, the abacus soroban features a system used before written numerals, and is still used in parts of the world by merchants, traders, and clerks An Ideal Montessori Math Tool: Make math practice more effective; Using an abacus as a math manipulative is a great way to teach

it's a gift of learning and joy

Because of the time it takes to craft these tile sets

5 inches (3 x 2

Borders are designed with number and letter algebraic coordinates for describing and recording chess moves

We've Got You Covered: "The Way to Go" by Karl Baker is included in this set to explain essential rules and strategies of the classic game of Go

Capture your enemy's king in his palace on the other side of the river

we've combined everything you need into this elegant set without compromising tile

you can comfortably play either version

Squares measure 4

3 x 1 inches (6 x 2

7 inches (40 centimeters) of room

2 patterns of 20-millimeter marbles (8 marbles per pattern)