It’s natural to learn from errors; that’s really what education is about. This is a gentle animated film originating from South America. It served as Uruguay's submission for Best Foreign Language Film at the 2014 Academy Awards, though it didn't advance to the nominations. The narrative centers on a young student named Anina, and unfolds around a conflict she experiences. As a consequence of this disagreement, Anina and another girl are each given sealed letters from the school principal, with instructions to keep them secure until instructed otherwise. What Anina discovers during that time and how events resolve themselves forms the latter portion of the film. The story seems well-meaning, but it’s somewhat lacking in a bright or uplifting feel. Certain sections feel underdeveloped, contributing to a rather somber atmosphere. This is especially noticeable in the middle part, although things improve toward the end. The visuals are striking and distinctive; it's certainly an impressive animated work. However, the film itself felt brief at just 80 minutes long. It’s based on a children's book and crafted with care. I believe more attention to detail could have elevated it further. There aren't any significant flaws in the story, artwork, or tempo, but the overall presentation didn't quite reach the level of comparable films from Hollywood. Aside from these minor shortcomings, it’s a respectable animated film, particularly considering its origin outside of North America, Europe, and Japan. It isn’t essential viewing, but I wouldn’t advise against seeing it, especially for those who appreciate animation. _6.5/10_

Source on TMDB