They are Quizbrix. A small company that builds hand-made premium Puzzle Boxes made from original LEGO bricks! A puzzle box is a sort of game that challenges you to solve it using all kinds of tools and special moves you can do with the puzzle. Each puzzle has different steps and the solution is very satisfying. It is a great gift for yourself and others, letting you even to store a small present inside of it so that the solver can also find something special from you once he finishes the puzzle.