Hi, Juliana!
Thanks for reaching out to the Disney Parks Moms Panel!
I understand selecting the one-day ticket at Walt Disney World Resort can be a little confusing. If you go to the
Disney Parks Tickets website, you'll see park options once you pick a single-day ticket.
First, you have to pick the date of your arrival. Prices are based on Value, Regular and Peak times of the year. Once you make that decision, you will need to pick between visiting Magic Kingdom Park or any of the other three parks. The Magic Kingdom is a little more expensive than the other parks when you choose to visit Disney World for a day.
You do not have to choose your dates or specific parks if you choose to purchase two or more days at Disney World. There are set prices for two or more. If you check the ticket site and pick two days, you'll see how the pricing changes.
I hope that helps with your planning! Please let me know if I can answer any additional questions.
-Jen