A New Jersey teen has taken "lending a hand" to the next level.

He used a combination of science and creativity to help make life easier for his friend.

Sammy Salvano isn't like most kids his age. The aspiring teenage engineer from Burlington County, New Jersey wants to use his technological talents to help people.

That's where his friend Ewan comes in. Ewan is missing most of the fingers on one of his hands, so Sammy worked all summer to design and engineer an invention that could help give him some more mobility.

He made a 3-D printed prosthetic hand, and it's a perfect fit!

The hand has five fully-functioning fingers, and its joints do a convincing job of mimicking actual hand movements.

Sammy's helping hand has made it possible for Ewan to pick up his mom's car keys for the very first time.

Sammy is an eighth-grader in the Medford Township School District. He hopes to eventually graduate from Drexel University with an engineering degree, just like his grandfather.

Sammy's ultimate dream would be to work for entrepreneur, engineer and business magnate Elon Musk.

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