For the ride portion of the answers, I suggest, that you and your son head over to Racer, Flight Deck, Delirium, Then go to Racer again, then ask if he wants to go hit, Vortex and Beast and BLSC, (AFTER THOSE) He might be able to tackle FOF and FH, one is a launching coaster, and one is a flying which could be intimidating. Whilst you and your son do that have your wife and daughter head over to NU, and have fun there. I suggest that you meet and hit Avatar, and Wild Thornberrys, then you can decide what to do from there.
But the most biggest thing to follow when you are here:
YOU MUST HAVE A GOOD TIME!