Orlando to Miami, X hours?

[MAC]

Any of my Florida brethren can tell me how many hours drive it is from Orlando to Miami? how many miles? Thanks in advance.

Was planning to take family to Japan, Hong Kong or Thailand for X'mas vacation, but all seats are booked, busy season for all Asia routes. Europe is too cold and my boys are too young to appreciate the churches and museums of Europe. We were just in Hawaii a few months ago, so we are thinking about Disneyworld. My boys are 13 and 14, never been to Disneyworld and glued to the computer screen, TVs and video games, so this maybe the last chance to enjoy Disneyworld, age-wise. Don't know how logical it is to drive from Orlando to Miami, maybe that doesn't make much sense? My wife and I were in Miami for a week years ago, rented a speedboat and really enjoyed Miami, we had no kids back then, so I don't recall anything interesting for 13 and 14 years old boys in Miami.