This has been bothering me...and I cant remember what the name of the movie is.

Let me describe as best as I can remember about the movie. It seems it was a movie about an alien child who was left without his parents....the thing I remember about this movie is that I took my little boy to see it thinking it would have a wonderful ending (as most do)...but, from what I remember the little alien boy dies....we were really shocked and so were other parents who all brought their children to see it

....so my question is: Do you recognize this movie and if so, what is the title?
Thanks for your help!!!