Disney still has the best parks..

For a 4 year old, magic kingdom will be first pick, then animal kingdom. Sea world is good, gatorland if a hidden gem.

Magic kingdom takes good two days, animal kingdom only need half day.

Epcot and hollywood studio, are good for older kids.

Universal studio has 2 parks, mostly for teenage kids. The Hulk still the best roller coaster, harry potter is cool, but not worth 5 hours.

Lego land still got way to go, very disorganized.