Yolanda Renee King reflects on grandfather Martin Luther King's legacy as she pushes for federal voting rights

"We're battling the same issues they did," King said.

At first glance, Yolanda Renee King is your average teenage girl. She's an eighth grader from Atlanta who participates in her middle school debate club and is waiting to hear whether she made the basketball team after trying out last week.

But as the sole granddaughter of Dr. Martin Luther King Jr. and Coretta Scott King, the 13-year-old not only juggles homework but also civil rights activism as she comes of age with a determination to uphold her family's legacy.

"I do consider myself an activist," King told ABC News. "Anyone who uses their platform for good, that's what activism is all about."

King was among the more than 50 protesters who were detained outside the White House for obstructing traffic during a voting rights demonstration on Nov. 3.