A basic abacus with rods that are easily removed for safety and storage. Each rod is numbered 1-10, so the child can collect the full set prior to exchange for 10s cube in the next column to the left. More advanced work brings in 100s and 1000s – just push 2 abaci together. You can use this method for decimals, the gap between the abaci representing the decimal point. Each assembled abacus stands 210 mm high and includes 2 rods, a base and 20 cubes (10 each of 2 colours). Set of 10.