What if he Ask you about the Rapture?

My brother Milzon and I had a chance to watch DVD movie last night. We watched the film Independence Day. It was an award winning film top billed by Will Smith. It is a film about an alien invasion that brought massive destruction on earth. The film was very stunning not just because of the film's amazing special effects but also because of the message the film intended to deliver. I was so surprised when Milzon asked me if there's really an "end of the world" just like what we've seen in the movie and when will it happen. Of course, i told him that there's non such thing as end of the world because i don not want him to panic and be bothered about this issue even though i know that it's a lie. The Rapture of the Church is quite complicated to understand at his age but i know the time will come that he will understand everything about this rapture. If you were in my situation, will you tell him about the rapture or you will also deny the fact that there's such thing as end of the world?