I’ve taken my kids (now 3&4) to Sea World San Diego twice a year since they were born. January will be our first time with the kids in Orlando. I honestly prefer Sea World with kids than any of the Disney parks. When I’m at Sea World, I feel I don’t *have* to do everything, just take a leisurely pace watch animals, ride rides, see shows.
My kids have always loved the kids rides at Sea World. Sea World has a lot more play areas for kids to just run around and play (nets, slides, jungle gyms). Disney parks don’t have many places for kids to just run around and blow off steam. Sea World is way better for young kids than Hollywood Studios, Epcot, and (in my opinion) Animal Kingdom.
My kids also love animals. The sea lions, penguins, and sting rays are their favorite. They always talk about putting their hands in the water to touch the starfish. They also love the ice wall in the Antarctic exhibit.
My son loves loves loves the sky tower, although it always breaks down. We thought he’d be scared, and he was the first time, but he loves it.
The kids can get antsy at shows, but they’ve been mostly 1-3 years old when we’ve gone. They’ll outgrow it. We just bring in snacks and they eat them during shows.
Overall, I’ve found that my young kids enjoy the less structured environment of Sea World then the “have to get on this ride, then this ride, then this ride” fastpass/stick-to-the-plan mentality of the Disney parks.