Everyone's doing it, and now you can too. All you have to do is fill every line, column, and 3x3 block with numbers 1 to 9… Sounds simple? It isn't... because you can’t repeat any of the numbers in each line, column or block.This sudoku is a doddle to play – as you simply use the stylus (which slots into the back of the unit) to click on the screen and play the game.This touch screen sudoku is packed with features: 4 levels of difficulty 1 million puzzles in total A Game Timer LCD contrast control Sound Backlight Save, Load, Solution, Hint and Clue functionsYou can even input the Sudoku from your daily newspaper and solve it at your leisure!This Sudoku is endorsed by MENSA – the high IQ society. Perhaps you will become good enough to join the elite group too!Takes 2 x AAA batteries (not supplied) Click here to buy batteries for this product...GIFT STATS: Backlit Touch-Screen SudokuMeasures: 12 x 8cmPackaging: Gift box