I saw it yesterday. I think it's way too intense for a 5 yr old, though there were some there. The "creatures", large centipedes, cockroaches, worm things, etc, were the worst part for me and I closed my eyes several times. The natives could be a bit frightening also.
I thought it was a good movie but not a 4 stars as some local reviewers gave it. There were several scenes that were way too long, the dinosaur chase and others. I hate to admit it, but I fell asleep during the movie, only for little catnaps that I can blame on medication.
The scenery and special effects were amazing.
Lord of the Rings is one of my favorite movies and when it was done, I wished for another hour. At one point during KK, I asked my dh how much longer. I'm still glad I went to see but to answer the OP's question again, too much for most 5 year olds.