I don't have kids, but I do have a fun story.
The first time I rode ToT, my friend didn't want to go, but I'm a huge Twilight Zone fan so I braved it by myself. I almost chickened out because I'm a little scared of elevators anyway. The little guy in front of me in line, probably about 4, spent the whole boiler room telling me all about how it was his favorite ride and how I shouldn't be scared. He ended up sitting next to me on the ride, and patted my arm as the door closed, telling me I would love it. He was right, it's my favorite now, too!