I’ve had this discussion before because I have two kids that are four years apart so it’s difficult to decide on a “right time.” According to my sister, who, like most of my family, still lives in Florida, there is no “too young” age to go to Disney. However, I disagree because she is speaking from privilege as a Disney Season Pass holder. To wit, she can go whenever she’d like and still be home for dinner. Considering the cost of going to Disney, and the probable infrequency non-Florida residents can go, I would err on the side of a slightly older child - 5 or so.