Rubik's Tower 2x2x4
There are many variations of the classic "Cube out there, but here's a "twist": imagine two 2x2 Rubik's Cubes stacked on top of each other, fixed to a central axis. As a result, this one takes on all sorts of strange shapes in the process of solving it, as blocks hang off and rotate perpendicular to their former neighbors!
This 2x2x4 Cube is an interesting twist on the original Rubik's Cube. Imagine two 2x2 Rubik's Cubes on top of one another, that are able to rotate around a central axis. This allows for an especially diabolical twisty puzzle!