Hi Laura! Welcome to the Disney Parks Moms Panel!
You will be visiting the Walt Disney World Resort this week and I know how exciting it is to say that! It will be a wonderful trip to Magic Kingdom Park and Epcot.
To purchase a 1-day ticket in advance, you can do so on the
Walt Disney World Resort website. Simply select "1" as the number of days, choose the date of your visit to Magic Kingdom Park, select the number of tickets you need in each age group, then choose Magic Kingdom Park as the theme park you are visiting. The cost of your purchase will show at the bottom of the page and you will select "Continue." If everything looks correct in your cart, select "Check Out" and you will be able to sign into your My Disney Experience account to link the ticket to your husband. Then you can make FastPass+ selections. Since it sounds like you have already purchased a 1-day ticket for your husband on Saturday, the less expensive option is to visit Guest Relations, a theme park ticket window or Lobby Concierge at Disney Resort hotels when you arrive for your vacation and ask to upgrade your husband's ticket to a 2-day ticket. Then, you will just pay the difference in price between the 1-day and the 2-day tickets.
Once you have your husband's ticket ready to go for Friday, search to see what
FastPass+ availability looks like. With the trip being so close, you may find that not all attractions and times that you previously selected with your daughter are available. If you are able to match his FastPass+ selections with yours, you can do so, but if not, you will need to decide to either keep the selections for you and your daughter and choose different ones for him or reschedule them all to match up.
I hope this helps, Laura! Enjoy your magical visit!
Tabitha