BOHS Wooden Rainbow Sudoku - 3 in 1 Easy to Hard - with Book of 320 Sudoku Puzzles - Desktop Brain Teaser Game Toys

Easy to Hard - Includes grid boards of 4x4 Grids, 6x6 Grids, and 9x9 Grids, ranging from easy to difficult, step by step for novice to expert players. Easy Storage - Designed with a drawer container, easy for storage and carry around. No More Erasing - Double-sided tiles for trial and error, no need to erase wrong number; no pencil or paper required. Multicoloured Tiles - Multicolored tiles also allow players to solve the puzzles with vibrant colors in addition to numbers. Promote Logical Thinking - Logical skills are the core requirement for playing a Sudoku puzzle. The difficulty level depends on the number of clues given, the more complicated inference pattern will become as you play more challenging puzzle. Anxiety Relief - Sudoku is a great way to focus on the task at hand and clear your mind of stress and anxiety. Improve Concentration - An interruption can break the player's train of thought and force them to start over,which eventually train the brain to block external distraction. Develop Problem Solving Skills - The problem-solving skills will be developed unconsciously through the process of trial and error and the logical thinking engaged.