Ok, I will do my best here, Janice.. bear with me.
I can't remember what the que line was like but, If I remember correctly posters of some of cartoon characters.
You go into this big type room, and there are cars, (well they are supposed to look like cars I think.. ) they are sort of like like the vehicles in the Ellen Degeneres attraction at Epcot... (thats what is reminded me of but the deminsions are a bit different.)
There is a big screen in front of all these cars. There are maybe 20-25 in the room (just a guess!)
They show Dick Dastardly on the screen, and the "plot" was to catch up with him. You go through scenes of many cartoons, Jetsons, Flintstones, and a few others.
The car moves up and down, to coincide with the action in the cartoon in front of you. I remember thinking it was going to be a kiddie ride, and well, the first few bumps, ... wow, it was fun..
After the ride there is a nice interactive place. There is a Flinstone car that kids sit in, a climbing tree (I think), and a keyboard on the floor where kids were stomping on it to make cartoon noises.
Of course there was a gift shop too.
You should find Kelly Monaghans book on Universal, his descriptions are much better than mine..