Each kid is so different, and they change from moment to moment.
They sometimes also have strange fears that they can't articulate for awhile, or at all (if they are too young). For instance, the drops on TOT didn't bug my then 4 year old at all, but "disappearing" freaked him out so bad he still won't go on it. Even though he knows we did NOT disappear. Just too good of an illusion.
The other day he finally went on Splash, and at the bottom of the big drop he had a look that I can't even describe...just terror, fear, I can't believe my mom took me on this, etc etc etc...but then a wave of water hit him, and that cracked him up (it was like someone slapping a hysterical person to snap them out of it, if that makes sense as an analogy), and now he LOVES the ride. If that wave hadn't hit him, he would probably hate the ride.
During DS's 3 year, he REFUSED to go on PIrates. He started watching the first movie at 3.5, but wouldn't go on the ride. Turns out that he hates going through, or "being eaten by", Davey Jones. On his 4th birthday, he was able to go on it...but for the whole 3rd year, nope.
The rides in bug's land are FABULOUS for DS. We finally got there when he was almost 3.5, and at 5 he still loves them. Still hasn't seen tough to be a bug, though, b/c I told him about the big (plastic) arachnids that come down from the ceiling (felt it was best to let him know what would be coming).
DS also has a problem going into buildings. He wants to see the ride, and he gets nervous when he can't. He still won't go into the Space building, not even far enough to snag a FP (though he will go up the exit ramp for the bathrooms). It took youtube, and the fact that I rode next to a same-aged boy who loved it, to get him into the Soarin' building, and that's one of his fave rides.
So...you'll just have to see what these kids are like, and try to work within what they are worried about, IF they are worried!
Oh, FWIW, DS's favorite ride over them all is Grizzly (he just likes getting splashed and possibly soaked).
