Mental abilities, as well as muscles need to be constantly trained and puzzles can be an excellent alternative to boring training. No one says that they need to completely replace the learning process, but periodically solving a particular problem in a playful way, you imperceptibly train your brain. OXXO is also designed for this. The challenge is to connect the pairs of blocks in a straight line. To do this, you must move the square plates in three-dimensional space. There are no special rules, you will understand the meaning of the game, starting to operate.