We did not have a car seat for my DD2.5 when we went in September. She was fine. We brought some books, coloring books and crayons for her and her sister (DD4.5). We flew JetBlue, so they got to watch some TV as well. Just remember this. What are you doing when you get to MCO? Are you renting a car, taking a taxi, having someone pick you up, or using Magical Express? If you are renting a car, you will also be renting a car seat (very expensive). If you are in a taxi or someone picking you up, you will also need a seat. On the ME bus, you do not.