The powerful sibling bond between a college senior and his little sister inspired an extraordinary life-changing invention.
Instead of taking the usual route for his college senior project, 22-year-old engineering student Vitaliy Bondarchuk used his skills to create a 3D-printed arm that’s helping his 7-year-old sister Bella live more freely.
Turning a college senior project into a personal mission
While most students at Bob Jones University choose straightforward engineering projects, Vitaliy decided to take a different path—one close to home.
He was inspired by his sister Bella, who was born with a limb difference known as a limb reduction defect.
“It’s a good feeling,” Vitaliy, 22, of Spartanburg, S.C., tells PEOPLE, adding, “I didn’t want to make a big deal out of it. I was like, ‘I’m just helping my sister.’”
Understanding limb difference and daily challenges
Bella’s condition affects the full development of her arm.
Limb reduction defects occur when part of an arm or leg doesn’t develop properly during pregnancy.
For some children, this can lead to minor limitations, but daily tasks become significantly harder for others.
Despite the challenges, Vitaliy says Bella never saw her condition as something that held her back.
As the second youngest of 13 siblings, Bella brings energy and joy to the family, especially with her love for painting and UNO.
How a sibling bond highlighted a gap in prosthetic design
When Vitaliy began brainstorming ideas for his college senior project, his mind went straight to Bella.
He realized a lack of prosthetic arms designed like multitools—something flexible, adaptable, and fun.
“I never really saw a multitool [one],” he said. “I thought it seemed like a very basic idea, a prosthetic arm [with] different attachments. But I could never really find anything like that.”
That realization sparked an idea, pushing him to build something that didn’t exist yet.
Sibling bond behind the custom 3d printed arm
Vitaliy poured over 100 hours into designing the prosthetic arm, combining his engineering training with heartfelt inspiration.
He brought the idea to life with the help of a 3D printer and advice from his older brother—also an engineer.
The result was a smart, functional 3D-printed arm built with Bella in mind.
It attaches using Velcro and includes a clip that lets her switch between tools she picked herself.
UNO, paint, and flashlights: Tools made with love
Bella was part of the design process from the beginning. Her biggest request? Make playing UNO easier.
So, her new prosthetic includes a custom card holder just for that.
Other tools include a flashlight and a paintbrush holder—perfect for her creative hobbies.
The arm is practical, playful, and, most importantly, a life-changing invention made just for her.
“She loves to play UNO,” her brother Vitaliy said.
And now, thanks to him, she plays it better than ever.
Family pride and future plans are rooted in sibling bond
Seeing Bella enjoy and benefit from the arm has brought joy to the whole family. She uses it daily and describes her feelings as “Great.”
Even though Vitaliy is moving to New Jersey for a new job, he plans to keep updating the prosthetic as Bella grows and explores new interests.
“My mom’s already asking us to make her something to drive,” he adds, but says, “we have a little bit of time for that.”
A life-changing invention with a heart
This wasn’t just an engineering project but a gift born from love and creativity.
The sibling bond between Vitaliy and Bella has become the heart of a story that inspires others to look at science and compassion as partners.
By blending his education with his deep care for family, Vitaliy created more than a tool—he made a symbol of hope.
Watch “Engineering with Heart: Vitaliy’s Story” by Bob Jones University and see how sibling bond inspired a life-changing 3D printed arm:
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