24 Nest Rings in four different sizes and in 6 gradient colors. Each color contains 4 rings in gradient of its hue, from brighter to lighter shade. You can complement the heuristic game with stringing, stacking, hiding and discovering and creating different games. These rings in its 4 different measures also allow the classification, grouping and association of elements through their size and shape, helping the development of logical-mathematical thinking. Recommended age +36 months.