I remember the old Zynga games, Cityville, Farmville; and they had some decorations that had animations of their own. Lets say, you can put a park bench on a path, well the path would have visitors sitting down. If you had a hot dog vendor, or something like it, you could have the worker and the person getting the food. Of course the only draw back to this would be, it would be an animated decoration, but it would give more life to the park. People in the game just walk around and look at the dinosaurs from the enclosures. What if you had animated people in the bar. Or have a building like an outdoor cafe?... When I design the parks, I make a resort area. I put the hotels near a lake, put a beach, some palm trees; it would be nice to see swimmers, people sunbathing. It would add to the feel of the game.