The Motion Picture Association (MPA) film rating system helps people decide what movies they should watch. The ratings are kind of like how grown-ups tell us which books we can read, like if a book is too scary or too grown-up for us.
There are five different ratings: G, PG, PG-13, R, and NC-17.
G stands for General audience. This means that the movie is okay for anyone to watch, even little kids.
PG stands for Parental Guidance. This means that some parts of the movie might be a little bit scary or grown-up, but parents can help explain things and make sure it's okay for their kids to watch.
PG-13 means Some material may not be suitable for children under 13. This means that the movie might have scary parts or some grown-up stuff that kids under 13 might not understand or be comfortable with.
R stands for Restricted. This means that only people who are 17 years or older can watch the movie. It might have a lot of grown-up stuff like violence, language or sexual content that might not be suitable for younger children.
NC-17 stands for No children under 17 admitted. This rating is for movies that are for grown-ups only. They might have a lot of adult content, like explicit sex or violence.
So, when you see a movie and it has a rating on it like "PG-13", that means some parts of the movie might not be for you and you might need to watch it with a grown-up who can help explain things. It's important to pay attention to the ratings, so we can make sure we are watching movies that are right for our age and won't give us bad dreams or be too scary for us.