This is a fun movie that most everyone in the family can enjoy. It's rated PG, has some violence, but no nudity and no language. Younger kids will probably not understand the Masonic and Knights Templar references, but they'll probably still enjoy it. The only thing anyone needs to understand about the Masons is the Knights Templar eventually became the Masons, and many of our founding fathers were Masons, so there's a bit of Masonic lore/connection tied into the movie. Other than that, it's easy to follow. Ben Gates is chasing a dream of finding a lost treasure, the map to which is supposedly hidden on the back of the Declaration of Independence. He steals the Declaration, then takes off on his adventure to find the treasure. To put it simply, "National Treasure" will remind you of a cross between the Indiana Jones trilogy (minus the snakes) and "Ocean's 11" (minus the drinking and profanity). You don't have to be a genius to watch it, and you don't have to be a history nut to understand it. No, there isn't really a map on the back of the Declaration of Independence (Is there?), but Indiana Jones didn't actually find the Ark, either. It's a fun, fantasy, what-if, kind of movie. Enjoy it.
Review of National Treasure
