Hello and welcome Paula,
As a frequent return visitor to the sunshine State of Florida and the current British Mum here on the Disney Parks Moms Panel I can completely relate to your great question as our UK exclusive
Ultimate Tickets are generally for 7, 14 or 21 days unlike the
US Disney Theme Park Tickets which come in several different combinations including
1 day Regular Tickets for Magic Kingdom or
1 day Regular Tickets for Epcot, Disney's Hollywood Studios or Disney's Animal Kingdom Theme Park plus Guests can choose to add on the
Park Hopper Option as an additional extra - all of which are priced seasonally.
To help with budgeting and to provide a general idea of the cost of a
1 day Regular Ticket for the Magic Kingdom bought online prior to visiting for dates during mid-September 2018 you should expect to approximately pay around $127 per adult Guest.
Of course another way to get your Disney-fix without entering a Disney Theme Park is to visit
Disney Springs or make Advanced Dining Reservations for a Character Meal such as
Bon Voyage Adventure Breakfast at
Trattoria al Forno at Disney's BoardWalk or within a Disney Resort Hotel or perhaps treat yourselves to a Dinner Show like my all-time favourite the
Hoop-Dee-Doo Musical Revue at Disney's Fort Wilderness Resort & Campground.
Magical wishes to you and your dear family Paula!
~ Jane