This 74-piece set includes 10 lengths of Number Rods from 1 cm to 10 cm long. Number Rods help children visualize counting to 10. Each length is a different color and scored in 1 cm, which helps with value identification and comparison. Teach children how to add, subtract and measure with these hands-on resources. Children can also build their own designs which fosters imagination and creativity. As children learn with the rods, they will improve fine motor skills, hand-eye coordination and logical thinking. Number Rods are packaged in a plastic jar with lid for easy cleanup and storage. || Size of rods: 1 - 10 cm. For ages 4+.