1x3 is inspired by interlocking burr puzzles. It is both: a piece of furniture and a brain game. THE FURNITURE: 1x3 is a coffee table that consists of 3 wooden sticks and a 10mm thick tempered glass top. All parts stay together without the need of glue and nails. All parts are made of solid pieces. THE PUZZLE: The interlocking principle of 1x3 involves only sliding movements, giving a very fast assembly process. That makes it appropriate for frequent change of place. The level of assembly difficulty depends not on dexterity but mostly on spatial vision. The name of 1x3 comes from the logic of its structure. The first figure represents the number of element types (1), the second one represents the number of elements of each type (3). The whole expression gives the total number of wooden elements (1x3=3).