I would Leed. The first two are quite child like. As the series goes on, it gets darker and more ominous.
The books are great, the films are fantastic. I could not give a shit if they're meant for younger people, I grew up reading them and the last two films are frankly outstanding (I mean Deathly Hallows part 1 and Half Blood Prince, I've yet to see Part 2)
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”