Christmas Picture Sudoku is a fun brain game that encourages your children, ages 4 and up, to improve problem solving skills, spot patterns, improve concentration, and think creatively as each Bible-themed puzzle is solved. Your young learners will solve 18 sudoku puzzles using the 200-plus included stickers. Then, for additional challenges and endless play, you can download the free app, where puzzles are solved by dragging and dropping each picture into the correct square. If the puzzle is completed correctly, kids are rewarded with a "Congratulations!" and encouraged to scramble the puzzle and play again! An answer key is included as well as a simple explanation of how to play the picture sudoku game.