Rubik's Tower Puzzle (or 2x2x4 Rubik's Cube) is an interesting twist on the original Rubik's Cube.
Imagine two 2x2 Rubik's Cubes, on top of one another, that rotate around a central axis allowing this puzzle to shapeshift. That's right - this allows for an especially diabolical twisty puzzle and makes it very difficult to solve!
The Rubik's Tower (or 2×2×4 Rubik's Cube) is an interesting twist on the original Rubik's Cube. Imagine two 2×2 Rubik's Cubes that rotate around the central axis allowing this puzzle to shapeshift.