We first took our kids to Universal when they were 3 & 5. They had a blast and did so many of the rides (however, they are and have always been little daredevils!) At that age we did Twister, Spiderman, Jaws, Back to the Future, you name it....anything they were big enough to ride, we rode. Well, we just got back last week, and now they are 8 & 10. We switched our Disney trip to Universal at the last minute, and let me tell ya, absolutely no regrets. We all had the best time. Don't get me wrong, I love Disney, in fact we are DVC owners, but if you ask me, USO/IOA was every bit as "magical" as Disney. We are all looking forward to going back.