I just went with a 2 1/2 year old this spring and I can tell you that Seuss Landing was like her Las Vegas. Just awestruck at how colorful everything was, the characters, and the rides. She couldn't get enough of the Caroseussel, the Trolly or the One Fish, Two fish ride.
Be sure to go into the Circus McGirkis restaurant for the show they have with Cat in the Hat, the Lorax, etc. They have a big meet and greet with the kids afterwards.