Theresa:
Thanks for coming to the Mom's Panel!
Although my recommendations for a first visit would fill a book---probably two books, I think every visit to Disney World means a full day at the Magic Kingdom taking in the parade
and the fireworks, and every family should experience at least one Character Meal (and you can use your dining credits to book them!) not to mention the Monorail.
Take a minute and visit Disney's website link for First-Time Visitors and
their recommendations
here. The website offers a way to customize your visit by clicking
here!
Make sure you get your "First Visit" button at Guest Services--you never know when some pixie dust may be sprinkled your way!
Wishing you a magical vacation!
Whitney