The 2015 Science Fair at the White House (15 images)

President Barack Obama poses with a group of 6 years old Girls Scouts from Tulsa, Oklahoma, who designed a battery powered page turner to help people who are paralyzed or have arthritis at the 2015 White House Science Fair, a celebration of students winners of STEM (Science, technology, engineering and math) competitions from across the country on March 23, 2015, at the White House, in Washington, DC. Pool photo by Aude Guerrucci/UPI

A group of six-year-old Kindergarten and First Grade students from Tulsa Oklahoma listen to U.S President Barack Obama (not shown) as he talks about the 2015 White House Science Fair in the East Room of the White House in Washington, DC on March 23, 2015. The young scientists designed a battery powered page turner to help people who are paralyzed or have arthritis. Photo by Pat Benic/UPI

A group of six-year-old Kindergarten and First Grade students from Tulsa Oklahoma listen to U.S President Barack Obama (not shown) as he talks about the 2015 White House Science Fair in the East Room of the White House in Washington, DC on March 23, 2015. The young scientists designed a battery powered page turner to help people who are paralyzed or have arthritis. Photo by Pat Benic/UPI

U.S President Barack Obama makes comments regarding the 2015 White House Science Fair, a celebration of students winners of STEM (Science, technology, engineering and math) competitions from across the country, in the East Room of the White House in Washington, DC on March 23, 2015. Photo by Pat Benic/UPI