Disney World in Orlando, Fla., will phase out its $78 three-day admissions pass on May 1, leaving visitors the option of buying one-day passes at $29 apiece ($23 for children ages 3 to 9) or a four-day pass for $97 ($77 for children), plus 6 percent sales tax.

The one-day and four-day passes will be $1 more than their current prices. The changes mean that a three-day visit will cost an adult $87, up from $78.The change coincides with the opening of Disney World's Disney-MGM Studios.

A four-day pass will grant admission to the new attraction as well as the Magic Kingdom and Epcot Center and will include transportation between them.

"People will need an additional day to see all of Disney World," said Don Dreyer, Disney World's publicity manager.