I loved Great Movie Ride the first time I went on it when I was 8. Actually, it was my favorite ride then and still is to this day. I took my daughter on it for her first trip when she was 2. I was concerned about how she would handle the Alien scene, but she did fine. I just made sure to tell her beforehand that the ride wasn't real and that it was all pretend. I also told her that it was in Mickey's park and asked her if Mickey would ever do anything that could hurt anyone. She said no. So we went on the ride and when we got to Alien, I looked down at her and just reminded her it was all pretend. She then said to me, "And Mickey wouldn't hurt me!" and everything was fine. The gangster, bandit, and wicked witch had no impact on her at all. When we got off of it, she asked to do it again. Later in the trip, when we went back to DHS, she remember that was where GMR was and asked if we could ride it again.
As far as One Man's Dream is concerned, she walked through a lot of the museum part rather quickly, but did like the replicas of the parks. I was hoping to get to go through the museum part a little slower but understood it not holding her attention. I was surprised that she sat through the movie with no problem. Here's hoping that in April, we can take a little longer... not holding my breath, though.