Please Tell Me The Name Of This Spanish/American Movie PLEASE !?

So I was in spanish class today and my spanish teacher showed us this movie with subtitles. The movie is about this mexican boy and his mom. So basically, the mom went to America and his son misses his mom and wants to visit her. After the boy's grandma died, he was very sad and desperate so he brought lots of money with him to go to america with the help of these american college dropouts trying to make some money. Unfortunately, lots of things go wrong and he continues to try getting to his mom. The boy is probably like 8 years old or something so ... anyclue what movie this is?? I THOUGHT the name was "Faces of the moon" but i was wrong but im pretty sure the world MOON was in there so please help me find the movie's real title and give me some link to the summary of it. Thankyu :]