Well he is only 2 months from being 5, but he is 4 none the less. He rode everything he could ride except Rip Saw Falls, Jurassic and T2 (T2 was my choice for him not to do). He had a blast. Loved everything, even though Spiderman gave him a little scare for some reason. It is even more strange since he loved Transformers. That being said, he is the absolutely youngest age I would take. There was only 6 rides, that I can think of off the top of my head, that he couldn't do.
Now since I haven't visited since you parked where City Walk now stands, I have a few notes and observations:
Change the name of the Jaws and Kong parking and pump some music in there. Every other section seemed to have music but those two.
Citywalk: Cool Place. Nice atmosphere and looks like it could be a lot of fun, especially back in my college days. That being said, not much to do family wise except eat and shop. I think they need to build a way to go around the place. Not only do you have to hike a mile from the parking garage to the parks, I feel like I am being forced through a gift shop before I even get to ride.
Island of Adventures: Don't laugh at this statement, but Seuss Landing has got to be one of the best themed lands in all theme parks. From beginning to end it is just like it should be. I will give you that there is not a lot to do and I am sure those of you that don't have kids, just skip over it. Yes, WWOHP is also one of the best themed lands I have seen as well. It just needs to be opened up. It is way to crowded, but it was awesome as well. I would say WWOHP is possibly better themed than Seuss Landing, but Seuss Landing has been around longer and I have a four year old, so it wins.
TO BE CONTINUED..