The KONG Genius Mike & The KONG Genius Leo are named in honour of geniuses Michelangelo & Leonardo Da Vinci. Designed to stimulate a dogs curiosity & hold its attention. These toys are great for helping to combat boredom & separation anxiety & can be used as a treat-dispensing toy on their own or interconnected for an increased challenge. Genius toys are great for puppies & adult dogs alike. Colours may vary.