... includes 6*6 sudoku game ,scounting, memory QQ, picking up Hong Kong kumquat, collision, figure magic square, lighting game, 1. It includes ... 6*6 sudoku game counting, memory QQ, picking up Hong Kong kumquat, collision,figure magic square, lighting game, 2. Calculating, ... effect increase interest of the games.5. Key buckle design for carrying.6. Built-in 2032 lithium battery.7. Automatic shut ...