Wordoku Square 4g puzzle consists of three independent games: Mini-Sudoku, Square Ring and Square 4x4 Grid Word puzzle.Mini-Sudoku is a 4x4 mini-version of Sudoku. Square Ring is a game of number crunching. Square 4x4 Grid Word puzzle is a Scrabble-like/Crossword-like game. Both are simple for fun and relaxation. They are great for any ages, any levels and at any times. And you may enjoy it with yourself and your kids for rest of your life.