Hi Bel,
The beauty of your three-day
Park Hopper tickets, is that it allows you to come and go between each of the four theme parks (Magic Kingdom, Epcot, Disney's Hollywood Studios and Disney's Animal Kingdom) at Disney World as much as your heart desires for three days. For example, you could visit Epcot during the morning, head back to Give Kids the World Village for a break and go to Magic Kingdom that evening.
You do not have to visit the parks three days in a row. Unless your tickets have the no expiration date option, any unused days will expire 14 days after the date the tickets are activated. Your tickets will become activated on the first day you visit a park and your tickets are scanned for entry.
You'll love having this flexibility because there are a lot of super fun activities at GKTW that your daughter will enjoy taking advantage of in addition to visiting the theme parks.
Wishing you many magical memories :-) Allison