Hi Sarah,
You will be able to take your baby with you on any ride at Walt Disney World that has no height requirement. The height requirements are posted on the park maps and on signs at the front of each attraction. You'll never have to wait in a line before finding out whether your daughter can ride. If you want to check out height requirements in advance, you can do so on the
Walt Disney World website attraction pages.
I made my first trip to Walt Disney World with my oldest daughter when she was 22 months old. We were able to experience dozens of attractions with her, by either holding her on our laps or sitting her on a seat right next to us. Some of the many things she'll be able to do include Jungle Cruise, Small World, Peter Pan, Dumbo, Carousel of Progress, Winnie the Pooh, Haunted Mansion, Buzz Lightyear, Pirates of the Caribbean, Country Bear Jamboree, and more.
Good luck with your planning and please let us know if you have additional questions.