I play :) A magical mystery box can be bought or received as a gift in Pet Society. To open 1 just drag the box into your pet's room and your pet will open it. Whatever item you get is a mystery! I've gotten chairs or a bookcase or something like that, nothing great. I think the worst box to get in Pet Society is the win or lose box. You get an item if you win or a pie in the face if you lose. I've gotten about 2 items from the win or lose box and 10 pies in my pet's face lol.