Hello Gloria!
Since you will be visiting Walt Disney World for two days, I would have to recommend Magic Kingdom and Disney's Hollywood Studios as the BEST parks a five year old would enjoy!!! Here is a list of the MUST SEE Attractions and shows for your family:
Magic Kingdom:
* ALL of Fantasyland
* Buzz Lightyear's Space Ranger Spin
* The Magic Carpets of Aladdin
* Tomorrowland Transit Authority PeopleMover (a.k.a. TTA)
Hollywood Studios:
* "Honey I Shrunk the Kids" Movie Set Adventure (HUGE playground...so fun!)
* Disney Junior - Live on Stage!
* Toy Story Mania!
* Voyage of the Little Mermaid
* Beauty and the Beast - Live on Stage!
As far as your Disney Theme Park tickets, I would only purchase the Magic Your Way Ticket Base Ticket for your family. With small children, it is very time consuming and exhausting to hop from park to park. It will take you AT LEAST 45 minutes to an hour to travel between parks.
I would take the extra money you will save on tickets and make a Dining Reservation at one of the great Disney World restaurants! I would recommend Crystal Palace for Magic Kingdom and 50's Prime Time Cafe or Hollywood and Vine for Disney's Hollywood Studios! To make Advanced Dining Reservations, you can call 407-WDW-DINE or make reservations online by clicking
HERE!
If you have other questions, please let me know!
Have a MAGICAL day!