Emily Bergenroth, 6, with other Girl Scouts from Tulsa, looks up at President Obama as he tours the White House Science Fair in the Red Room of the White House on March 23. The girls used Lego pieces and designed a battery-powered page turner to help people who are paralyzed or have arthritis. (Jacquelyn Martin/AP)

Monday was the 2015 White House Science Fair, and more than 100 students got to show off their projects, including a Girl Scouts troop from Tulsa who built a battery-powered page turner. The project was made from motorized Lego toys for people with disabilities that make it difficult to turn pages while reading.

The girls, all 6 years old, are members of the "Supergirls" Junior FIRST Lego League Team from troop 411, and wore capes to the White House. Adorable!

There was also a dog there named Derby who had 3D-printed legs.