This is the only four-sided Tetris game that reacts to your hand movements. Invented 25 years ago by a Russian mathematician, Tetris requires players to clear the relentlessly advancing blocks ("Tetriminos" in game parlance) by arranging them across a full line. But rather than pressing keys, you alter a Tetrimino's direction by simply tilting or turning the handheld console, allowing blocks to be dropped on any side of the 2" x 2 1/2" monochrome LCD grid. Tetriminos may also be rotated with the push of a button. Three game modes and 15 levels provide hours of fiendishly addictive play. For one player. Includes two AAA batteries. Ages 8 and up. 1" H x 5 1/2" W x 5 1/2" D. (7 oz.)