Hi Kristina,
Welcome to the Moms Panel! You can get more information on Magic Your Way tickets
here. With a 2-Day base ticket, you can visit one theme park on each day. If you go to the Magic Kingdom on the first day, then you can not go to any other theme park. However, you can leave the Magic Kingdom and return on the same day; for example, you could return to your resort for a mid-day break.
If you want to visit more than one theme park on the same day then you have to purchase the Park Hopper option.
None of the Walt Disney World Resort hotels are inside a theme park. Thus you can come and go as you please to any of them without any kind of admission ticket. For example, the Animal Kingdom Lodge is located outside Disney's Animal Kingdom theme park.
Enjoy planning your vacation and write back if you have any more questions!