Jurassic Park might be good if he doesn't seem to mind falls and likes dinosaurs alot.
I would recommend Jaws, since that was slow but had some good thrills, but that was shut down at the beginning of this year... I LOVED Back To The Future when I was about his age, but that's been replaced by The Simpsons... Oh!!! Does he like shooting games? If he does, he'll LOVE Men In Black!
I kicked butt on that one and had a blast!
But it depends which Universal park you choose. If you choose Islands of Adventure instead, I gotta say... Only things I remember riding all day that day were Harry Potter and The Forbidden Journey, which was my FAVORITE, and Flight of The Hippogriff. I only rode the second one because Sirious Black's (and Reubeus Hagrid's) Hippogriff, Buckbeak is one of my favorite animal characters in the series. Otherwise, I would never have ridden it because I HATE coasters.
But Harry Potter and The Forbidden Journey, like I said, was AMAZING. You've got your wizards, witches, spitting tarantulas, dementors, and even a FIRE-BREATHING NORWEGIAN RIDGEBACK DRAGON!!! And the waiting que for the ride is just as amazing as the rest of the experience! You even get to walk through Madam Pomfrey's classroom on the school grounds and look at some screaming, wiggling Mandrakes!
And of course the Harry Potter sweets sold at the shops are SOOO worth a trip! I fell head over heels in love with their pumpkin cider! <3 But thinking of it makes me wanna cry... Where I live, they used to sell chocolate frogs with cards, cotton candy bubblegum, and Bertie Bott's Every Flavor Beans... But they stopped selling all of it when The Wizarding World of Harry Potter was completed, and I can't just go there and get my 'Potter fix. :'(
Oh! I almost forgot some other things from the other park, though. The first park I was talking about also has a really cool Beetlejuice show. If your son knows even remotely who BJ is, that show'd be really fun to watch.
((Lol Wayyy too many kids no longer have any inkling as to who THE GHOST WITH THE MOST is!)) ((('Scuse me. lol XD I just really love Beetlejuice. I've watched the entire animated series and the movie wayyy too many times. lol)))
And no matter who you are or what age you are, if you like E.T., the E.T. Adventure ride is a must-do! It's slow, and not really action packed, but if you love E.T. enough, it will always be fun.
I'll provide some links so you can take a look at some things yourself.
Harry Potter and The Forbidden Journey
Jurassic Park
POTTER SWEETS!!!
The Simpsons
Despicable Me Minion Mayhem
Men In Black Alien Attack
Betelgeuse, Betelgeuse, BETELGEUSE!!!
E.T.'s Adventure MY name for this ride, though... "TO THE GREEEEEEEEN PLAAAAANNNNNET!!!!" OR, since I'm kind of a hardcore E.T. nerd... "WHAT THE HECK IS BOTANNICUS DOING STRANDED ON EARTH TWICE?!".