Tetris is one of the most popular games of all time, a deceptively simply yet completely addictive game in which players must fit falling blocks together. The Tetris Constructible Light is an interlocking light with 7 interlocking pieces. The neon magic-cube design is sure to bring fun and style to your desktop. The 7 interlocking tetromino pieces can be stacked in any combination. The light turns on when the pieces are stacked together and it turns off when dissembled.