Jumbo Challenge Sudoku for Ages 9-13 Years Vol 1

A big volume of 300 sudoku puzzles and answers for advanced sudoku players. Preteen girls and boys 9-13 years. Trains the brain in logic and problem-solving. Fun puzzles to relieve anxiety, aid stress relief. Playing puzzle games helps with feeling calm. These puzzles are harder than medium or easy. Great gifts for girls, boys sisters, brothers, friends, cousins who like to play Sudoku, Can be used for Valentine's Day, Easter, Christmas, stocking stuffer, secret Santa, white elephant, birthday presents, and party favors. Hours of entertainment for players. Can be used for homeschooling activity, Sudoku Club, or classroom group.