Move over Sudoku, here come Balance Benders™! You can use these books as quick, fun logic problems or as stepping stones to success in algebra. Children develop deductive thinking and pre-algebra skills as they solve balance puzzles that are more fun and addictive than Sudoku puzzles! Children must analyze each balance to identify the clues, and then synthesize the information to solve the puzzle. Try one -- and then try to stop! Sold as a pack of 2 identical books.