Hi Kelly,
Thank you for coming back to the Disney Parks Moms Panel with another question!
When adding the Park Hopper Option to your
Theme Park Tickets it will be for the entire length of stay. Unfortunately there is no way to add a Park Hopper for just one day. The cost to add this option is reasonable, and differs slightly depending on how many days of Theme Park Tickets you have already purchased. When you arrive at Walt Disney World Resort, visit any Guest Relations and a Cast Member will be happy to add the Park Hopper Option to your Tickets. With this option, you will be able to add the Park Hopper Option to the actual guests needing entry into the second Theme Park, not your entire party.
Even though you technically only need the Park Hopper Option for one day, you may find it a good way to to explore parts of Walt Disney World Resort that you may have missed during your prior visits. My daughter and I like to quickly pop into different Theme Parks to enjoy our favourite attractions one last time, or to see Happily Ever After at Magic Kingdom Park.
I hope you you have a magical visit to Walt Disney World Resort, Kelly. Please let me know if you have any other questions, I am always happy to help.
Stephanie