V-Cube products are a uniquely designed and constructed series of skill games. They are 3D mechanical cubic puzzles that rotate smoothly on the 3 based axes for the coordinate system. The V-Cube collection was invented in 2008. the technology allowed for the world's first 6x6x6 & 7x7x7 cube. The technology allows for endless possibilites. The smooth mechanism allows for easy movement when solving the puzzle. Difficulty level: 3.5