This is truly heartwarming. It not only speaks volumes of the LEGO "System" but also of how our minds can enable us to conquer so many challenges if only we don't constrain our imaginations. From this People Magazine piece:
Torres wanted to design a product that would not only offer prosthetic arms to children with missing limbs – like 8-year-old Dario, who lost his right arm to a congenital malformation – but also boost self-esteem and help ease the trauma of being different. That's where Lego came in.