Hi, I'd like to come down the last week of June for 7 days with my 19 year old son and 16 year old daughter. Not sure if I should stay in Miami Beach vs. Miami, and would like to avoid car rental if possible. Is Miami Beach more for young adults, vs. teens, and which area would be better for sightseeing? Is it realistic to not have a car? I'm going to need activities and/or day trips just about every day to keep the kids from being bored. Would you please suggest some things that would appeal to teens?