AWESOME MATT!!!!! Definitely give him a Revelation book. Heck, give him a knowledge book, reasoning book, and a slap on the butt! Maybe find out what Bible he uses...not that you can't teach the truth from any Bible...
Matt, you're the man! I'm saying a prayer for you right now (I wish I could send my reasoning book to you by email). Oh, and if you need to, go to Watchtower.org for anything you might need articles on. Jehovah will give you holy spirit if you ask for it, and you won't need to worry about this kid knowing the Bible so well.
he doesn't use the NWT but he uses a version that has God's name in it, he knew God's name, and he knew the whole LORD in caps thing too which was surprising