Hi Linda and welcome to the Disney Parks Moms Panel.
Being fellow international visitors, my family and I also generally visit the Walt Disney World Resort for 2 weeks at a time.
In terms of
Theme Park Tickets, a 10-Day Theme Park Ticket is the longest multi day ticket available to purchase. Each ticket provides access to one theme park per day and all ticket days must be used within 14 days of first use.
You then have the ability to add the Park Hopper Option and/or the Water Park Fun & More Option to your tickets. With the Park Hopper Option, you enjoy same-day access to all 4 of the theme parks. The Water Park Fun & More Option offers a certain number of visits to Walt Disney World destinations based on the length of your ticket. (For example, a 10-day ticket allows 10 visits.) Walt Disney World destinations include Disney's Blizzard Beach Water Park, Disney's Typhoon Lagoon Water Park, ESPN Wide World of Sports Complex, Disney's Oak Trail Golf Course, Disney's Fantasia Gardens Miniature Golf Course and Disney's Winter Summerland Miniature Golf Course.
Depending on the number of days that you are planning to spend at the Walt Disney World Resort, which parks you intend to visit and which options you would be adding, it may also be worth considering purchasing
Annual Passes in lieu of multi day tickets. This could potentially work out to be similar in price but would also entitle you to discounts on resorts, dining, merchandise, recreation and tours etc.
Unfortunately, I have run out of room to assist you with the rest of your questions but please feel free to visit us again on the Disney Parks Moms Panel to ask us any further questions which you may have.
Wishing you a magical holiday filled with memories which will last a lifetime!
Emma