Hi, Cathy!
Welcome to the Disney Parks Moms Panel and thanks for your question. Your visit to the Disneyland Resort is almost here! I hope you’re getting excited for all the magic that awaits you at “The Happiest Place on Earth.” Be sure to see Disneyland Park’s newest live show, Mickey and the Magical Map!
From what I understand, valid Walt Disney World Resort theme park tickets can be used for admission to the parks at the Disneyland Resort, although I have never personally done this. A ticket without an expiration date that still has available days on it could, in theory, be used for admission. However, Disney Parks tickets are non-transferable, so keep in mind that only the person who used the ticket on the previous days (if it was in fact used) is allowed to use it again. It would be best to inquire about exchanging the Walt Disney World ticket for a 3-Day Park Hopper Ticket at the ticket booths in the theme park esplanade rather than at your resort hotel.
I hope this helps, Cathy, and that you have a wonderfully pixie-dusted visit to the Disneyland Resort! Please feel free to write back with any other questions you may have.
Wishing you magic,
Courtney