Instruct: Classify a given review into positive or negative sentiment.
Query: Must have for kittens!

The best thing about this is that the cat can play with it by herself. We bought this for our kitten, and she absolutely loved it. You can use it with your hand, or you can attach it to something stationary like a door knob. We attached it to a table in a room and she would get a running start and leap for it several times a day. It was great way for her to expend energy, which is essential for nutzo kittens. It's something about the springy action of the wire they really like.