Features: 1. The wool ball has a round hole for catmint powder, which is used to store cat mint to let cats enjoy playing for a long time. 2. Convenient replacement, replace fresh catmint at any time so that kittens can keep enthusiasm for play anytime and anywhere. 3. Exquisite craft, non-toxic and no odor, adopting natural wool ball. The natural material is safe and resistant to bites without any deformation. 4. Ball toy can attract cats and to ease an unhappy mood. 5. Catnip can remove the hairball for cats, which is beneficial and healthy for their stomach to make their appetites better.