Let's say you have a 5 day Park Hopper Plus. Each ticket allows you unlimited admission to the four major parks (Epcot, MK, AK, and MGM Studios) for 5 days. You can hop from one park to the other as many times as you want during each day. You also get 2 Plus features, good for 2 admissions to Typhoon Lagoon, Blizzard Beach, Pleasure Island, or Wild World of Sports). The plus features are used independently from the 5 day park tickets. If you spend a day at a water park, and do NOT go into a major park that day, you have used one plus, but still have all 5 park hopper days left. If you decided to go to Pleasure Island one evening after spending a day in the major parks, then you have used one day, and one plus. These tickets never expire. If you used all 5 park days and one plus, you can still use the other plus feature on another trip.