Student Kaitlin Reed demonstrates her attachable wheelchair lever for President Obama at the 2015 White House Science Fair

Kaitlin Reed demonstrates to President Barack Obama the attachable lever she developed that can make wheelchair movements easier and less tiring, during the 2015 White House Science Fair in the Blue Room, March 23, 2015. With Kaitlin is Mohammed Sayed, who developed a 3D-printed modular arm for his wheelchair that can be used as a food tray, camera tripod, rain canopy, laptop holder, and cup holder. The two 16-year-old students are from Massachusetts. (Official White House Photo by Pete Souza)