The Nina Ottosson by Outward Hound Treat Maze is a level 2 game perfect for pet owners needing an enticing solo game to reduce destructive behavior and boredom for their pups. Great for pups who have mastered level 1 games and are ready for an added challenge! This brightly colored dog puzzle game is easy to fill with treats and can be shaken to release the scent in case you pup hasn't already noticed! The Treat Maze has no additional parts so it's mess-free and easy to clean with soap and water.