Pet Interest Snake 3D Cat Toy with Silver Vine & Crinkle Paper Filing.Cat toys are a great way to reduce stress and relieve the cat from it, a fun activity that boosts the cat's mood. Silver vine is a climbing plant that grows in the mountains of China and Japan. It is twice as attractive as catnip is for cats and therefore very strong, as a result to that about 80% of cats respond to it.Instructions:Cats love squeaky and soft stuffed toys, but we suggest introducing them carefully.Place your cat's toys in interesting locations. Strategically place them in areas that might spark some interest, for example, place a toy on one of the perches of a cat tree.