Children of the American Revolution – CAR
more properly known as:
The National Society of the Children of the American Revolution
http://www.nscar.org/

The National Society of the Children of the American Revolution, founded in 1895, is the oldest patriotic organization for youths in our country. Membership is open to descendents of patriots of the American Revolution. The N.S.C.A.R. is open to children who are lineally descended from a person who directly aided in the cause of the American Revolution.

Requirements for joining the CAR
Any boy or girl under the age of twenty-one is eligible for membership in the National Society of the Children of the American Revolution who is lineally descended from a man or woman who, with unfailing loyalty, rendered material aid to the cause of American Independence as a soldier, sailor, civil officer, or recognized patriot in one of the several Colonies or States, or of the United States, provided that the applicant is personally acceptable to the Society.

CAR information – FAQ
http://www.nscar.org/faq.htm

Locating a CAR society near you
http://www.nscar.org/societies.php