The speed cubes set uses a vivid and bright color scheme and brings you a different and delightful pleasant visual experience. ABS plastic, safe and non-toxic. Harmless to humans and the environment. Perfect Christmas Gift / Birthday Gift No one who falls out of love with this classic puzzle game will ever go out-of-style. Improve child's grip, hand-eye combination coordination, vision, release peoples life and work pressure. A classic puzzle game will never go out of style. The ultimate gift for kids, friends, family members. The magic rainbow puzzle set, which is available in 6 packs of 3 x 3x3 stickerless Speed Cube Sets, ranging in size from 4 to 12 pcs each with its own speed and speed control system, as well as an app-enabled smart electronic Bluetooth magnetic speed cube set.