Rubik's Mirror Block
Also known as the 'Bump Cube' or 'Mirror Cube' the Rubik's Mirror Block is a 3x3 cube with an interesting twist.
In it's solved state, the Mirror block resembles the classic 3x3 Rubik's Cube. However, that's where the comparisons end. The Mirror Block's unique mechanism and different sized blocks result in the cube changing shape with every move you make, resulting in confusion! All six sides of the Mirror Block have silver stickers, which makes the puzzle more difficult to solve than a regular Rubik' Cube.