Hi Laura!
I love going with a group of "princesses" to the Princess Half Marathon!
She can absolutely go to the breakfast, no worries! Anyone can purchase a ticket to eat breakfast with the Disney Princesses. It's a great way to say hello to them, and maybe grab some magical photos!
She's also welcome to chEAR you guys on along the course. If you go to the
Princess Half Marathon page and click on the tab "SPECTATORS", you will find some great resources for her. There are some spectator packages available, but she does not have to buy one to watch.
Also, be on the lookout for the Official Event Guide. You will receive an email notification when it's available and it always has great spectator information inside.
My favorite spectator viewing area is right inside the Magic Kingdom.
Here is the information about viewing there:
Spectators will be able to see their runner run through the Magic Kingdom® Park near Cinderella Castle (Mile 5.3). This location will be open at 5:30 a.m. You do not need a ticket to enter the Magic Kingdom® Park, but to enter the ChEAR Zone area, you will need a ChEAR Zone wristband.
I hope this helps! Please let me know if you have any other questions.