2x2x4 Rubik’s Tower
The Rubik’s Tower is a fully functional 2x2x4 version of the Rubik’s Cube which means it’s not just a regular 2x2x2 Pocket Cube with some extra pieces glued to the faces but as you can see on the image the 4 layers move individually.
This puzzle comes in the original Rubik’s brand packaging. The turning quality is not so great, it contains springs and hooks to secure the pieces that are sticking out so you can’t execute totally random turns on it.
This shape-shifting twisty puzzle is not so hard to solve. You can approach it bringing it to the original 2x2x4 shape first, then matching the outer pieces to the inner pieces and finally solving it as a 2x2x2.
Other 2x2xN cuboid twisty puzzles
We have to divide the 2x2xN cubes in two groups because the models with even and odd layers work differently. It’s clearly visible on the attached image that the 2x2x3 version of the Tower Cube blocks the puzzle when a high 2×3 side is rotated 90o. Odd layered 2x2xN models allow only 180o turns on side faces while even layered cuboids allow quarter rotations. An interesting fact is that on 3x3xN puzzles it’s the opposite.
Picture by clauswe1
The puzzle in the back on the picture above is a 2x2x13 cuboid. Pretty impressive!