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. br br Based on the super-addictive worldwide favorite br br Seven-piece interlocking light br br Bright, neon magic-cube design br br Pieces can be stacked in any combination br br Light turns on when the pieces are stacked together, and off when dissembled br br Product Dimensions: 7 x 4 x 1 inches ; 3.5 ounces br br China supplier: br br Email : fangzhengcn@hotmail.