The Arf Pet Interactive Fun IQ Wooden Puzzle is an easy and fun way to challenge your pet's smarts. This MDF toy features little nooks and crannies for you to hide treats in, adjust the difficulty level, and then watch as your pet figures out how to get the prize. It's entertainment for all parties involved! Made from MDF. Dimensions: 9.1L x 8.5W x 1.5H in.. Fill holds with treats or food challenging your dog to find them. Provides mental stimulations and challenges. Easy to clean. Adjustable difficultly levels.