As a kid, Easton LaChappelle was always fascinated by robotics and how things worked, leading him to take his passion and learn more about prosthetics engineering.

That's when he turned to YouTube to experiment and master everything from the core fundamentals of electronics to software interfaces and reading sensors.

That's when he turned to YouTube to experiment and master everything from the core fundamentals of electronics to software interfaces and reading sensors.

Eventually, 25-year-old Easton used his newfound skills and created a working device, making it all the way to the White House Science Fair with then-President Obama.

During his science fair days, Colorado's Easton encountered a young girl with a prosthetic arm that looked "archaic" and cost about $80,000. He remembers thinking, is "this really her best available option?"

He tells WS, "That's when I decided to dedicate my life to solving the affordability of prosthetic devices and creating technology that can impact someone's life on a deep level.

There are over 40 million amputees worldwide, and only about 5% of them have access to prosthetic devices. It was just not acceptable to me and I wanted to do something about it."

After developing a working prototype, Easton founded a company, Unlimited Tomorrow, which makes low-cost, machine-printed prosthetic limbs.

In under 30 days, the company was able to raise $1.568M to release its first product and provide millions of prosthetic devices to people worldwide at an affordable cost.

"We make a product called TrueLimb," says Easton, "an affordable, 3D-printed prosthetic limb that uses a special remote-fitting process that is personalized to your skin tone, shape, and size for the perfect fit."

"Because of YouTube," he tells WS, "I was able to turn my passion into a business that is having a positive impact on people's lives."

(WATCH Easton's amazing story below).

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