Challenge your dog's brainpower with the Kong Genius Leo Dog Toy. Made from a durable, non-toxic, food-approved plastic material in a bowling pin shape, the Genius Leo toy is perfect for an average chewer. Use with any Kong treat, or fill it with food and use the Genius as an engaging mealtime feeder. It helps combat boredom and separation anxiety, making it great for puppies and adult dogs alike. The Kong Genius toys can be interconnected to create new configurations for an added challenge. Dishwasher-safe. Extra-Large: 6L x 3.8W x 10.5H inches. Large: 5.5L x 3.3W x 9.5H inches, Small/Medium: 7.8L x 5W x 2.5H inches. Assorted color shipping.