Hi Tracey,
They is much more to do at WDW than you can do in 6 days. My best advice is not to try to do it all. Choose a few must-dos for each day and explore the parks at a relaxing pace.
Your daughter will love The Magic Kingdom. I would recommend starting there. Rides like
It's a Small World, The Many Adventures of Winnie the Pooh, and
Peter Pan's Flight, are sure to be among her favorites. There are so many attractions perfect for toddlers at Magic Kingdom you may want to spend 2-3 days there.
Hollywood Studios also has many activities she will enjoy. If she watches TV, you may want to watch some of the Playhouse Disney's television shows such as, Mickey Mouse Clubhouse, the Little Einstein's, or Handy Manny. All of these shows are part of the big
Playhouse Disney - Live on Stage show. There is even a breakfast and lunch buffet with some of the Playhouse Disney characters. If your daughter likes dancing and music, you may really want to check Playhouse Disney Play n' Dine. It was my daughter's favorite restaurant when she was two and best of all she can eat off of your plate for free.
Be sure to also check out
the Traveling with Little Ones guide. It includes lots of tips and a list of all the attractions that your daughter would enjoy.
Have a magical vacation,
Michelle