Hey, Christopher! Welcome to planDisney.
Cheers for stopping by with your question. It's my pleasure to help you.
I really love
character breakfasts at Walt Disney World Resort. What a magical way to begin the day! Make sure you get lots of photos.
Since you have a 9:10 AM dining reservation, you should be fine entering
Magic Kingdom Park at 9:00 AM. If you're a few minutes late, there's usually a short grace period for late Guests. So I wouldn't stress about it, Christopher. If you're staying at a Disney Resorts Collection hotel, did you know you can enjoy
Early Theme Park Entry? Therefore, you can enter Magic Kingdom Park at 8:30 AM if the regular opening is 9:00 AM. I love to make use of this benefit because you can experience one or two of the major attractions before the park even opens! I like to visit Seven Dwarfs Mine Train and Peter Pan's Flight.
Whatever you choose to do, I trust you'll have a "practically perfect" day, Christopher. Thanks for stopping by planDisney.
See ya real soon!
Mike