Except for the merchandise at the Jimmy neutron store, I don't recall. The man working there said you see dora's house, but I saw nothing. Blue's clues I know isn't in there. I wonder why these two things you are mentioning never were included in the ride. I mean they do have every other character that exists in the drawing board.
I'm a little surprised, too. Both Dora and Blue's Vlues are major Nick Jr. shows. Maybe because the park demographic is not really a preschool focus. I will, howeve, be on the lookout for Dora's house.
I don't know about that preschool stuff. The ride is pretty childish enough and have sponge bob, rugrats, etc. I think they could have made that ride better, but that is just a personal opinion.