Delanie’s fifth-grade classmates say they are excited about her new robotic arm, but they are used to how she is. “It’s going to be cool, but she does so much without it,” said her best ...

Delanie’s fifth-grade classmates say they are excited about her new robotic arm, but they are used to how she is.

Delanie’s fifth-grade classmates say they are excited about her new robotic arm, but they are used to how she is. “It’s going to be cool, but she does so much without it,” her best friend ...

The main design for the 6-inch hand came out of South Africa, where 3-D printers are being used to make low-cost prosthetics for people in war-torn areas.

ST. LOUIS — The soon-to-be 11-year-old left the Washington University School of Medicine lab with an instruction manual for her new robotic arm.