Good morning, Yevgeniy, and welcome to planDisney! It looks like you'll be at the Disneyland Resort in just a few short weeks - how exciting!
I absolutely love the
Park Hopper option and utilize it any time my family and I visit the Happiest Place on Earth. I'm happy to report that you can still add that option to your ticket - it's not too late! In fact, I needed to do this for a trip I took late last year and did so a few weeks before our trip.
There are two ways you can add this ticket option. The first, and easiest, in my opinion, is to
call the Tickets line to speak with a Cast Member. They should be able to give you all the details and walk you through adding this option for your upcoming trip. Second, you can also wait until you arrive at the Disneyland Resort for your trip and speak to a Cast Member in person at one of the ticket booths outside the main gates of the parks.
Overall, I think you're going to really love having the Park Hopper option for your visit. Keep in mind that you will still need to make
theme park reservations for each day of your trip. This will be the park that you start your morning in, but then you'll be able to hop back and forth between parks starting at 11:00 AM.
During your visit, make sure to go see
Rogers: The Musical in Disney California Adventure Park! It has a limited run, so chances are that you won't be able to see it again after this trip. It sounds like it will be a really fun show!
Thanks again for your question, Yevgeniy. I hope you have an amazing trip to the Disneyland Resort!
Have a Magical Day,
Greg