Yes, there are cat-safe plants that can provide entertainment for indoor cats. Some examples include cat grass, catnip plants, and spider plants. These plants stimulate a cat's curiosity with their leaves and offer a safe and enjoyable chewing experience for them. However, you must ensure that the plants you provide are non-toxic to cats, as some plants can be harmful if ingested. Constantly monitor your cat's interactions with plants and ensure they don't consume excessive amounts. Providing safe plant options can be a great way to enrich your indoor cat's environment and keep them mentally stimulated.