Intelligent Rainbow Building Set: Made of selected solid wood and hand-polished, it includes five rainbow-shaped building pieces. Designed specifically for children over 3 years old, this set helps develop color recognition, hand-eye coordination, and creativity through free building Safe and smooth polishing process: Through multiple manual polishing processes, the 360° edges and corners are rounded, smooth, and free of burrs. The wood is sourced from nature and has no odor. The color is bright and vivid, and does not fade. It always provides thoughtful care for little hands Color perception and visual enlightenment: Guide children to observe the gradual color changes of the rainbow, enhance their color recognition and matching skills through building activities, and at the same time, through the rainbow shapes, soothe their emotions and cultivate their aesthetic sense Fine motor skills and spatial thinking: Grasp the building blocks to stack, assemble, and balance them, exercising fine hand control and spatial imagination, and unlocking various creative designs Concentration and Emotional Healing: The assembly process requires patience and concentration. Successfully completing the rainbow shape brings a sense of achievement; when not in use, it can be used as an emotional healing item, providing a soothing visual effect and bringing a sense of calm