This Magnetic Sudoku Battle Starter Kit is designed to be a two-player game, using the 3×3 and 4×4 grids. So much fun!This provides children with the benefits of Sudoku, including improved logic, observation and concentration skills.Sudoku,originatedin 18th century Switzerland,is a logic-based, combinatorial number-placementpuzzle.In classic Sudoku, the objective is to fill a 9×9 gird with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid contain all of the digits from 1 to 9.Sudoku Battle Kit is developed as an intriguing mind training tool for children. To introduce the fun of Sudoku to children, the starter level of 3×3 and 4×4 grids, and the advanced level of 5×5 and 6×6 grids have been designed, creating a gentle transition to the classic 9×9 grid.Content: 1 x Battle box, 32 Sudoku magnets, 36 x sudoku puzzle cards, 1 x parent guide.Language: EnglishNumber of players: 2Game time: 10-20 min.Product: 4 x 18,5 x 23,5 cmAge: 4-7 yrs