This is a skill building game that will challenge and entertain your child. Sudoku is the first puzzle to shake the puzzle world since crossword puzzles were introduced in 1926. In order to win the game, players must not repeat an animal vertically, horizontally or within a 6 square mini-grid. It comes complete with 55 original puzzles and Colorforms that you use to fill in the grids. This is a perfect game to take along on travel. It will challenge your child's thinking skills and keep them engaged in a problem solving good time.