<p>Dressed in superhero capes, six-year-old Girl Scouts, from left, Alicia Cutter, Addy O'Neal, Emery Dodson, Karissa Cheng and Emily Bergenroth, of Tulsa, Okla., meet with President Barack Obama before showing him their project during his tour of the White House Science Fair, Monday. The girls used Lego pieces and designed a battery-powered page turner to help people who are paralyzed or have arthritis. </p>

March 24, 2015