Park Hoppers allow admissions to and switching between during the day:
Magic Kingdom, EPCOT, Disney-MGM Studios, and Animal Kingdom.
If you add the PLUS option to your tickets, you receive a certain amount of admissions (depending on the length of the ticket) to:
Blizzard Beach, Typhoon Lagoon, Disney Quest, and Pleasure Island Clubs.
You can now walk through Pleasure Island and shop without paying admission. You just need to pay if you want to go in a club. That admission price will allow you to go into all the clubs for the rest of the night without paying again.
Have Fun,
Cindy in NY