Hi Mayra!
How wonderful that you will be taking a trip to Walt Disney World in June!
I have enjoyed looking at your itinerary. Breakfast at Disney's Pop Century Resort, followed by Disney's Hollywood Studios is straightforward and requires no reservations. I would make a 5.00 pm reservation for dinner at
Cinderella's Happily Ever After Dinner at 1900 Park Fare at Disney's Grand Floridian Resort. I would allow 60 minutes travelling time back to Disney's Hollywood Studios, between 6.30-7.30 pm.
Fantasmic! is scheduled to start at 9.00 p.m. on June 4th, and as seating begins 90 minutes before the show starts, it is recommended you arrive as early as possible. The park stays open until 12.00 midnight with Extra Magic Hours. Dining reservations can be made
online, or by calling (407) 939-3463.
This sounds a very exciting day for the birthday girl, and it is also potentially a very busy day. I would suggest you might wish to return to your resort for a relaxing break during the afternoon - maybe for lunch, for a nap, or a swim - before you make your way to Disney's Grand Floridian resort for your dinner reservation. Again, allow 60 minutes to travel between both resorts.
Have a magical vacation!