The main character truly is blind in real life. The acting comes across as more genuine. The characters surrounding him both magnify or serve as a great contrast to developing his own personality to the viewer. Therefore, some characters may appear quite simple in their presentation, and their characters left a bit undeveloped, but that draws us even closer to the emotional depth and plight of the main character (the blind boy).
We are given an intimate look into his character's earnest search for love and acceptance, and how he readily gives it to those around him. Even though this boy is very young, I think that even older age groups can somehow relate to his search for pure love and acceptance, especially from the one being that everyone is blind to (at least physically) -- God.
On the surface, the acting may seem somewhat simple, but that makes the underlying message even stronger. It makes the movie seem more like a surreal blur between a fantasy fable and real-life. Not knowing how to clearly draw the line adds to the beauty and magnetism of this movie. There is a strong universally spiritual yet non-denominational component to this. It is not preachy, in my opinion, because it makes mention of God without constantly waving a specific religious denomination in your face. I was deeply touched at certain scenes that I believe will stay with me for a long time. If you are looking for a movie with a solid storyline and emotionally-moving message, check out this movie.