Hi Audrey,
How sweet to know you'll be visiting the
Disneyland Resort with your little ones!
I'm sure it will be an unforgettable trip for all!
At this time, parents can usually vouch for their young children without having to show proof of age if their little ones are under three. Cast members can generally tell when a child doesn't require park admission. If your two-year old is bigger/taller than other kids his age, a Cast Member may request age proof, at which point it wouldn't be a bad idea to show a copy of your kids' birth certificate.
I have only seen this happen a couple of times in the last few years so you can say Disney uses a type of "honor-system" but like I said, it's always good to be prepared, just in case.
As far as your 4-year-old, I'm sure he will be proud to hand his park ticket to a cast member at the entrance turnstiles!
Audrey, don't forget to download the
Disneyland App before you arrive at the parks. It will come in handy in terms of offering attraction wait times, parade schedules, character meet and greets and many other features!
Also, make sure you take your kids to
Buzz Lightyear's Astro Blasters where they have a chance of becoming "galactic heroes" if they score enough points!
Have a magical day and remember to always wish upon a star!
-Anabel M.