I have 4 kids and when we went they were 9, 7, 5, and 2. There were PLENTY of rides they could all ride on. My girls loved that tea cup like ride in the superhero area and rode it twice, I think! We didn't ride on Spiderman but plan to on our next trip. They have an arcade but it is crazy expensive!!
The Jurassic park area is cool, the newspaper comic area is lot of fun! Lots of water rides! Of course, the Harry Potter area is great! We spent a lot of time in the Dr. Seuss area also and loved it! Lots of shows and characters to entertain!
In Studios, they have a great kids area that is geared towards smaller kids but even my older ones had a lot of fun there! We saw a short magic show that the kids liked and a character parade. Despicable me is fun!
We hit most of the highlights but didn't get to see everything. We plan to spent time soaking it all in the next time! But there wasn't a time that my kids felt bored or anything. They loved it, even my smallest kiddo!