Greetings, Melanie!
Thanks so much for bringing your question to the Disney Parks Moms Panel. It sounds like you have a couple of epic Disney trips happening in the next few months. I am envious!
You are correct that MagicBands are only used at the Walt Disney World Resort in Florida. These act as your park ticket, hotel room key, credit card, and are wonderful fashion accessories, of course. Since these are not utilized at the
Disneyland Resort, they are not sold on property. For a huge inventory of MagicBands, I recommend checking out the
selection on shopDisney.com. There are literally MagicBands for every type of Disney, Star Wars, Pixar, and Marvel fan. I recently purchased a Haunted Mansion band that I cannot wait to wear again on my next Walt Disney World Trip.
While you will notice many similarities about your California and Florida Disney vacations, you are going to see some VERY obvious differences. Disneyland Resort is essentially completely accessible by foot. You can quickly walk between parks, to your hotel, and through the Downtown Disney District. At Walt Disney World Resort, the scale of the parks and resorts is truly massive. It's basically an entire city! You will still encounter friendly Cast Members, and exciting attractions and entertainment that feel magical at both destinations which is why I keep returning to both coasts regularly!
I hope this helps, and have a Fantasmic day!
-Jennifer