The number Rods introduce the child to quantity, from one to ten & he also learns the names along with it. The set has a total of 10 colored rods namely Red & Blue. These Rods are in lengths from 10 cm to 100 cm. They are divided equally & painted in Red & Blue. The size of the Rod increases progressively the second rod is twice the size of the first rod & the third rod is thrice the size of the first rod. This set is typically used with the number cards. Number cars sold separately item # M04