There are good theme park packages from Universal Studios Florida and Legoland in Carlsbad, California. Disneyland also has multiple vacation package options. Some theme park packages are customizable.
The Universal Studios Florida vacation package is offered with or without airfare. It includes seven nights at one of the hotels nearby and a FlexTicket to get into Universal Studios Florida, Universal’s Islands of Adventure, Wet ‘n Wild Orlando, Aquatica and SeaWorld Orlando. Early park admission and live entertainment are included.
The Legoland package includes park tickets and a hotel stay for the entire family. At Disneyland, there are customizable packages that involve hotel stays and transportation.