Hi Jennifer,
Sea World is a beautiful place to spend a day with your family. My two boys love ocean life, and enjoy taking an excursion off Disney property to visit when we are on vacation. They especially love the attraction that allows you to feed dolphins. We have some amazing pictures of them doing this!
You can use the LYNX Public Transportation Bus System and catch bus #50 from the Ticket and Transportation Center (TTC) to Sea World. Buses run throughout the day. Reviews on the "ease" of using the system are mixed, as you have to factor time to get to the TTC, stops along the way, etc. The trip can take you well over an hour each way. You can also hire a taxi, which are available outside the main lobbies of all of the resorts. If taxis aren't waiting, you can ask the front desk to call one for you, and they'll be happy to do so. Finally, you can use Mears Transportation Service by calling 407-423-5566,or visiting
www.mearstransportation.com for reservations and current prices. Mears has vans that can transport your entire party in one vehicle if you request this. They can also make arrangements to pick you up at Sea World to return you to your resort as well.
My vote for the most convenient way to get to Sea World would be to contact Mears and arrange for a van. Have a wonderful vacation!
Tanya