THE MOST COMPLEX CUBE: One of the largest Rubiks Cubes created, the 5×5 promises to push your problem-solving capacity. Known as the Professor Cube due to the sheer difficulty to complete it!,THE ULTIMATE CUBE TEST: The Rubiks 5×5 is not for the faint-hearted and is the most complex of all the Rubiks Cubes. However, knowledge of how to solve the 3×3 Cube and the 4×4 Cube will help you a lot.,ORIGINAL RUBIKS: A combination of mathematics, art and science, the iconic Rubiks Cube challenges your mind and problem-solving skills. This complex brain teaser is an ideal gift for a Rubiks Cube enthusiast who has completed the 3×3 Cube.,IMPROVED PLAY: All the features of the classic original Rubiks Cube but with faster, smoother and more reliable play. No more frustrating snagging or popping core.,CLASSIC PUZZLE-SOLVING GAMEPLAY: This challenging puzzle is the same retro toy that you remember from your childhood. Brain teaser, fidget toy, or travel puzzle- this brain puzzle is your new go-to.