EB Excalibur ET453 Einstein Touch Sudoku Millions play Sudoku everyday! Keep your mind sharp with the rising difficulty of each puzzle. Choose from easy, medium or hard puzzles so you can play at your pace. It comes with a hint key just in case you get stumped. Einstein Touch Sudoku contains more than 800 puzzles, all easy to work with the included stylus!Batteries Required 2 AAA Age Requirements 13