You can have breakfast with the Disney characters as well. If you spend any time over in the Tampa area, the aquarium is pretty good. I wouldn't spend the time to go if you are going to SeaWorld though. Probably be a let down from there.
Also about half way between Tampa and Orlando is the Fantasy of Flight museum. Get to see a lot of vintage planes that they have restored as well as some in the process. While there you can go on a hot air balloon ride or go up in a vintage biplane. I did the biplane ride last year and it was great. Since then they have added one where you can actually take over the controls, very cool. It is only $25 for adults and $14 for kids.
http://www.fantasyofflight.com/
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Slate Blue H3 Adventure w/sunroof, Monsoon/NAV, DVD and marker lights