President Barack Obama holds a polymer while talking with Peyton Robertson, 12, about his projects during the 2014 White House Science Fair in the State Dining Room of the White House, May 27, 2014.
President Barack Obama holds a polymer while talking with Peyton Robertson, 12, about his projects during the 2014 White House Science Fair in the State Dining Room of the White House, May 27, 2014.