If you are visiting Disney World on multiple days, I highly recommend purchasing Park Hopper tickets. Park Hopper tickets allow guests to go to multiple parks in one day. The regular entrance ticket only allows you to enter 1 park per day. The Park Hopper tickets allow you greater flexibility during your visit. If one park is really packed and the lines are long, you can open up the My Disney Experience app to see if the other parks have shorter lines. I used this hack often, especially with the Magic Kingdom. Magic Kingdom is the busiest park, and thus has the longest lines. If you run out of FastPasses and can’t stand to wait in long lines, check out the other parks to find better options.