Sudoku it is a numbers game which players have to fill each of the blank boxes in a puzzle based on specific rules. - Improves your memory. - Stimulates your mind. - Reduces the chances of developing Alzheimers. - Learns to do things quickly. - Increases your concentration power. and Easter Eggs Coloring good for meditation too. These fun and whimsical designs depict Easter eggs decorated with sudoku puzzle eggs within eggs.