The best gift you can give to your cat varies depending on their individual preferences. However, here are some popular options:

1. Interactive toys: Cats love engaging toys that provide mental and physical stimulation, such as puzzle feeders, treat-dispensing toys, or wand toys with feathers or strings.

2. Catnip: Many cats react positively to catnip. You can buy catnip toys or even grow your own catnip plant to provide a fun and stimulating experience.

3. Comfortable bedding: A cozy and comfortable bed or blanket will give your cat a designated spot to relax and sleep.

4. Scratching post or cat tree: Cats need to scratch to maintain healthy claws and stretch their muscles. A scratching post or cat tree provides a suitable outlet for this behavior.

5. High-quality food and treats: Offering nutritious food and tasty treats will ensure your cat's overall well-being and make mealtime more enjoyable for them.

6. Grooming tools: Depending on your cat's coat type, brushes or combs can help keep their fur healthy, remove loose hair, and provide a bonding experience during grooming sessions.

7. Cat-friendly plants: Certain plants, like cat grass or catnip, can offer entertainment and enrichment, allowing your cat to explore and nibble on safe vegetation.

8. Litter box upgrade: If your cat's litter box is old or small, consider getting a new, larger one with convenient features like odor control or self-cleaning capabilities.

Remember, the best gift ultimately depends on your cat's individual preferences, so observe and learn their likes and dislikes to determine what they might appreciate the most.