The set of 64 rods has a selection of rods numbered 1-10 and is ideal for smaller groups of children. Each rod has a number on one side and a corresponding number of dots on the reverse side. Our rods join together with ease, and tackle a number of different mathematical areas such as addition and subtraction, and multiplication and division. Each rod is color coded to represent a number with the longest rod (number 10) measuring 7.9" long x 1.2" wide. All our rods are chunky and appeal to young Math learners. Age: 3+.