These Learning Resources Cuisenaire Rods Introductory Sets help students transition from concrete to abstract representation of math concepts. Each color represents a different length that can be assigned a different numeric value or unit of measure. Good for improving CCSS skills such as fractions, measurement and more, your child can strengthen their skills and learn new ones, as they practice with these plastic math rods. These are ideal for use in the classroom or at home and are sure to bring hours of discovery and learning. Math games are great ways to introduce boys and girls to the wonderful world of learning counting, numbers, early math skills and more. This educational toy keeps little minds engaged and stimulated and makes a great gift for ages 4 and up.