I just took my one year old son to WDW, we did the magic kingdom and epcot. We went on all the rides without hight restrictions, including pirates and he did fine. He looooved the country bears and the donald duck ride in the mexican pavillion. There were some rides that were dark and he was unsure of, but he'd just hug my neck and look around with awe. It was hot and he wore my rear end out, but he was laughing and clapping. He might not remember it, but me and my 10 year old daughter will. If I was you, I'd start off with rides like it's a small world and winnie the pooh and see how your baby does. There's always parent swap if you need too. We just took it easy, took lots of breaks in the a/c and had a great time! One thing I did was we went to the parks in the morning, then went back to the hotel for a rest in the afternoon and went back to the park around 6pm when the sun was starting to go down.