Brick by Lego brick, teen builds his own prosthetic arm

David Aguliar poses with his prosthetic arm built with Lego pieces during an interview with Reuters in Sant Cugat del Valles, near Barcelona, Spain, February 4, 2019.

David Aguliar touches one of his prosthetic arms built with Lego pieces during an interview with Reuters in Sant Cugat del Valles, near Barcelona, Spain, February 4, 2019.

David Aguliar poses with his prosthetic arm built with Lego pieces during an interview with Reuters in Sant Cugat del Valles, near Barcelona, Spain, February 4, 2019.

Prosthetic arms built with Lego pieces David Aguilar are seen during a Reuters interview with David Aguilar in Sant Cugat del Valles, near Barcelona, Spain, February 4, 2019.

David Aguliar points at his prosthetic arms built with Lego pieces during an interview with Reuters in Sant Cugat del Valles, near Barcelona, Spain, February 4, 2019.

David Aguliar poses with his prosthetic arms built with Lego pieces during an interview with Reuters in Sant Cugat del Valles, near Barcelona, Spain, February 4, 2019.