Montessori math materials,help kids learn to count, learn addition and subtraction, understand the decomposition and combination of numbers.Colorful double side Numerical Rods：Arabic numerals on one side, English on the other side,and bright colors attract the child's attention and let it learn actively.Nice gift: A variety of play methods, suitable for children of all ages: color enlightenment for children, counting, stacking blocks, addition and subtraction games for children aged 3 6, etc.