Question: what age is best to visit disney world?
Answer: Disney's Magic Kingdom (Ages 3 to 12) ... 
Disney's Animal Kingdom (Ages 7 to 12) ... 
Disney's Hollywood Studios (Ages 3 to 17) ... 
Epcot (Ages 10 to 14) ... 
Disneyland Park (Ages 3+) ... 
Disney California Adventure (Ages 10 to 14) ... 
Related: What to Pack for a Disney Cruise: The Ultimate Packing List.