An interesting and entertaining take on the traditional 3x3 puzzle is the QiYi Void Sandwich Cube (Stickerless). Its distinctive "sandwich" color scheme, which consists of three separate horizontal layers and a hollow middle, makes for an entertaining visual effect and an engaging puzzle-solving experience. The cube's clever internal mechanism allows it to turn smoothly and steadily even without a core. For beginners, collectors, or anybody wishing to add some flair to their cube collection, this novelty puzzle is fantastic.