Welcome back, Song!
Thanks again for bringing another question to the Disney Parks Moms Panel. I'd love to assist you in making sure your grandchildren get to experience a magical and royal transformation at the
Bibbidi Bobbidi Boutique in Disneyland Park. These experiences must be booked by calling the Style Line at (714) 781-7895 from 7:00 AM to 7:00 PM PST up to 60 days in advance. While I do not think there is a "best" time to call this number, I always advise calling as soon as the phone lines open in the morning and throughout the day. I have reached this number numerous times throughout all hours of the day and evening, so I'm hoping you will soon, too!
If you have some little princesses of your own, make sure you stop by
Fantasy Faire in Disneyland Park to meet some of their favorite Disney Princesses at the Royal Hall. You can also see some familiar fairy tale stories come to life at the Royal Theatre here as well. I recommend downloading the
Disneyland app before your trip so you can view locations and times of other Princess and Disney Character meetings throughout both parks.
I hope this helps. Have a Fantasmic day!
-Jennifer