A group of students built a robotic hand for their 15-year-old classmate, who said the device changed his life, reports say

• Classmates of Tennessee student Sergio Peralta, 15, built him a robotic hand, CBS News reported.
• A teacher who had learned Peralta's hand was not fully formed told him his students could help. 
• The prosthetic that the engineering students created changed his life, Peralta said.

A 15-year-old student who was born with a hand that wasn't fully formed received a life-changing prosthetic from his fellow pupils.