Shay Hughes' 22-year-old daughter Star and 20-year-old son Tucker are both self-reliant and highly motivated, says Ms. Hughes, of San Diego.

WSJ: When Adult Kids Stay on Their Parents' Cellphone and Entertainment Accounts

They are people who love recognition and are highly motivated to apply their intelligence to benefit their own self-interest, such as aggregating land to increase their geographical empires.

FORBES: Obama in Israel: Was His Leadership Smart or Wise?