Jackie,
Nannys are welcome here too!
So I will need a bit more information to help you. There are many different character breakfasts around Walt Disney World, both in the parks and outside the parks at area resort hotels.
For instance there is the
Crystal Palace character breakfast at the far end of Main Street USA. That is in the park. But there is also
Chef Mickey's at the Contemporary and
'Ohana at the Polynesian. The first is a 5 to 10 minute walk away from the front of the Magic Kingdom park gates, the latter is a short monorail ride away.
But regardless of where you have a reservation, a 10:30 am reservation should allow you a lot of time to explore the surrounding area. Just to be safe, write me back and let me know where you are dining, and we can work further from there!
Have a magical (and delicious) vacation!