how about free!!!! try a log cut from an oak, or maple tree keep bark on and make sure you keep it in an easy clean area. (do not treat!!! it will fall apart in time but do not treat as cats do tend to eat bark.) if cat shows no interest try a catnip spray to attract cat to it.(this is the natural way for them and its free,) also some cats might like moss rock, or lave rock, caution if you use these as cats tend to lose more claws this way. but cats preference. as we know cats do what they want when they want to..