I would give IOA the majority of your trip - but only if your kids like rollercoaster if they don't. us/ioa should only be 2 days.
SW you can do in a day - unless you have a big time animal lover - feeding the dolphin, seals, and stink rays will take some time for that person..... not to mention petting and touching - the dolphin and stink rays....
you can't touch the seals - they are not very friendly....