My DD is the biggest chicken ever but she has been on HM since she was 2 and always gets a laugh out of it. I have personally never noticed it to be particularly loud in the buggy, but then again, to me, all of Disney is loud so it's just one more thing. Where we had a little moment was in the room (the holding pen as DH calls it) when they turn out the lights and then the guy is hanging. She was kinda freaked by that but since we had prepped her it only lasted a minute. One thing we've always done since she was that young was to remind her that part of going to an amusement park is being "scared silly", in other words, scared to laughing as opposed to scared for real, and that the little feeling of "fear" you get in your tummy is normal and part of the experience. This only goes so far with her though, and at 9 she will still go no where near that Snow White ride after her first trip on it at 2 1/2.