Toy Cubby Sudoku Number Cube Puzzle 1 piece, Brain Challenge Sudoku Number Cube Puzzle. Made of high quality material doesnt break or disassemble easily when fall, easy to twist and turn. Cube measures 2 x 2 x 2 inches, fits well inside your backpack. Helps overcome boredom anywhere and anytime, perfect for passing time. Serve as a gift, desktop or divider cabinet decoration and a must included puzzle in your puzzle collection.