- USD 4.99
Descripción de editorial
Ahoy! You're an accidental pilot aboard a submarine that's sinking fast! Solve the puzzles to take control and navigate safely back to land. Devised by an expert on brain training, these mental gymnastics—and a friendly dolphin—will see you through your ocean adventure! You can't skip a puzzle, but there are hints to help and full answers to get you on your way.