Reasonably priced amusement park, especially if you can catch special deals from Seaworld's web site. Prepare to walk though as the park is laid out, with some exhibits (dolphin feeding) on one side of the park and rides (Steel Eel & Great White roller coasters) on the opposite side. While running / walking shoes would be great for the amount of walking you'll do, you are sure to get wet, so a water shoe or flip-flop is ideal. A lot to see and do for all ages from Sesame Street themed shows and kiddie rides to the 155 foot drop of the Steel Eel roller coaster. The various shows are entertaining as well. I really enjoyed the Beluga whale show because of the acrobatics of the high dive artists. If you are wanting to get splashed during the shows I suggest finding locations near the front (in the marked Splash Zones) and as close to the middle as possible. Family and I sat in a couple of Splash Zones but off to the side and remained dry.
The admission is a bit pricey ($21 / adult), but one of the few attractions I have come across where one gets their money worth. In a nutshell the owner has turned a multi-story warehouse into an amazing wildlife / rainforest habitat. I am a fan of zoos and the Dallas World Aquarium provides one of the more immersive wildlife experiences.