... 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, mine ... 4. Rich sound effect increase interest of the games.5. Key buckle design for carrying.6. Built-in 2032 lithium battery ...