Pinyin is really fun pop-up book children's 3d pop-up book baby Chinese pinyin learning artifact enlightenment cognitive organ flip book picture book story book 3-6 years old young children connect preschool first grade spelling basic training. 3D stereo effect, colorful illustrations, cute and vivid images, fully mobilize children's hands, eyes, mouth, brain, and comprehensive understanding of pinyin. Through syllable prompts and spelling examples, children can easily master the rules of spelling.