However, to give you some ideas, here are some popular and generally well-regarded TV programs for 12-year-olds, categorized by genre:
Adventure/Fantasy:
* Stranger Things: A sci-fi/horror series with a strong dose of nostalgia, friendship, and coming-of-age themes.
* The Witcher: A fantasy series based on the popular books and video games.
* Shadow and Bone: A fantasy series based on the Grishaverse novels by Leigh Bardugo.
* His Dark Materials: A fantasy series based on Philip Pullman's novels.
* Percy Jackson & The Olympians: A fantasy series based on the popular books by Rick Riordan.
Comedy/Drama:
* The Good Place: A funny and thought-provoking comedy about ethics and the afterlife.
* Never Have I Ever: A coming-of-age comedy-drama about a teenage girl navigating life, love, and loss.
* The Mitchells vs. the Machines: An animated comedy about a dysfunctional family that saves the world from a robot apocalypse.
* Brooklyn Nine-Nine: A comedy series about a quirky police precinct.
* The Umbrella Academy: A superhero series with a darkly comedic tone.
Science Fiction:
* Star Wars: The Mandalorian: A live-action Star Wars series about a lone bounty hunter.
* Doctor Who: A classic science fiction series that has been running for over 50 years.
* The Expanse: A science fiction series set in a future where humanity has colonized the solar system.
* The 100: A post-apocalyptic science fiction series about a group of teenagers sent back to Earth to see if it is habitable.
Animated:
* Avatar: The Last Airbender: A critically acclaimed animated series about a young boy who must master the elements to save the world.
* The Legend of Korra: A sequel to Avatar: The Last Airbender.
* Gravity Falls: A quirky animated series about two twins who uncover a secret world of magic and mystery.
* Adventure Time: A surreal and imaginative animated series about a boy and his dog in a magical land.
* Steven Universe: A heartwarming and inclusive animated series about a young boy who joins forces with three magical Gems to protect the Earth.
It is important to note that:
* Some of these programs may be more appropriate for older teenagers, so it's always a good idea to preview a show before letting your child watch it.
* You can also check out resources like Common Sense Media for reviews and age recommendations for TV shows.
Ultimately, the best TV program for a 12-year-old is one that they enjoy watching and that helps them learn and grow. Encourage them to explore different genres and find shows that pique their interest.