Hi Deb - How exciting! That will definitely be lots of fun!
Besides the Magic Kingdom, which is amazing to visit for the first time (regardless of age), I'd also recommend checking out the Epcot International Food and Wine Festival. It runs from September 28th - November 12, 2012 so you'll have the opportunity to attend. While I generally enjoy walking around the various kiosks, sampling something from each place, there are also cooking demonstrations, seminars, and more.
In addition, you may consider attending
Mickey's Not So Scary Halloween Party, which takes place on select evenings in the Magic Kingdom. It really is one of my favorite events as Walt Disney World, and I'm sure your neighbor would love it.
I hope that helps! Have a great vacation!