What an excellent Tetris Constructible Light Lamp!  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. These pieces can be stacked in any combination. The light turns on when the pieces are stacked together, and it turns off when dissembled. Buy it from here