Spark students' interest in mathematics and help them learn important math concepts as they progress from concrete representation to abstract thinking. Cuisenaire Rods provide endless opportunities to introduce, investigate, and reinforce key math topics such as addition, subtraction, fractions, geometry, measurement, multiplication, and division. Plastic rods are durable and easy to clean. This is one full set of Cuisenaire rods. It includes 74 rods total. There are rods in 10 different lengths, ranging from 1 cm - 10 cm. These rods are also great for STEM and engineering activities.