MrBeast Gifts Fan With “Most Futuristic Bionic Arm on the Planet”

What began as a routine clinic visit turned into a once-in-a-lifetime surprise for 12-year-old Kai Pollnitz, a Texas middle schooler born without his right hand.

Kai lives near Austin and spends his time playing basketball, practicing karate, gaming, and watching his favorite creators on YouTube–especially MrBeast. For years, he dreamed of having a bionic arm to help with everyday tasks many of his peers take for granted, from tying his karate belt and cutting his own food to riding a bike and feeling more confident at school.

“I really like basketball because I can play it,” Kai said. “I can get past most people and shoot.”

As Kai entered middle school, teasing and bullying became a painful reality. “People usually try to tell me what I can’t do,” he said. “But I’m actually really good at sports and video games.”

While researching prosthetic options, Kai’s parents discovered Open Bionics, known for building advanced multi-grip bionic arms with customizable covers inspired by brands like Disney, Marvel, Star Wars, and Call of Duty. However, Kai’s health insurance would not cover the cost of a myoelectric prosthetic.

“We tried crowdfunding and did everything we could as a family,” said Kai’s adopted mother, Charlotte Pollnitz. “It was humbling to make a video asking for help, but we just wanted Kai to have a fair chance at life. Every donation brought him hope.”

Even as fundraising progressed slowly, Charlotte brought Kai to our clinic in Austin for an evaluation.

“Even before we could afford it, Open Bionics treated us like we mattered,” Charlotte said. “Anytime I had questions, someone answered with real advice. We knew we were in capable hands.”

During the appointment, Kai tried a bionic arm for the first time.

“We both cried,” Charlotte said. “He has never been able to use that hand, and suddenly he could. Watching him pick something up and drink from a cup with his right hand felt unbelievable.”

Kai described the experience as “fantastic,” but knowing his family’s situation, he reassured his mother: “It would be so great to have a right hand, but I’m fine with waiting.”

What Kai didn’t know was that a surprise was already in motion. When Jimmy Donaldson—known globally as MrBeast—learned about Kai’s story, he decided to step in.

Just a few days before Christmas, Kai returned for what he believed would be a routine follow-up appointment. Instead, MrBeast walked into the room carrying a custom-built Hero PRO bionic arm, designed just for Kai. The arm featured hand-painted MrBeast-themed covers, complete with the iconic blue-and-pink panther and Kai’s name.

“He was completely in awe,” Charlotte said. “He kept whispering, ‘Mama, is this real? Is that really MrBeast?’”

“This is the most futuristic bionic arm on the planet,” said MrBeast. “There are sensors in the arm that pick up on your nerves, so you can use the hand without having to pull on anything.”

“At first I couldn’t speak,” Kai later admitted. “I never thought I’d meet him in real life.”

Behind the scenes, our ambassador Tilly Lockey—a bilateral bionic arm user herself—was also present for the reveal.

“Being part of this project with MrBeast feels full circle for me,” Lockey said. “I was once the kid being surprised with a bionic arm, and now I get to be there for Kai. I know exactly how life-changing that moment can be.”

Hero PRO is one of the most advanced multi-grip bionic arms available today, developed with input from more than 1,000 users over four years of research and development. The fully wireless, water-resistant arm can lift up to 55 pounds, is touchscreen-compatible, and features a fully articulating wrist with a quick-release system for activity attachments.

With his Hero PRO, Kai has already begun tackling two-handed tasks for the first time—on the basketball court and at home.

“We never imagined something like this would happen for him,” Charlotte said. “It’s once in a lifetime, not just because he met his idol, but because he now has a bionic arm that will change his life.”

When asked what he hopes others take away from his story, Kai said, “Don’t let people put you down. Nothing’s going to stop you. You just learn an alternative.”

The reveal was filmed by the MrBeast production team and is now available to watch on the MrBeast YouTube channel.

We work with children and families every day who are navigating questions about insurance and funding. Schedule a free virtual consultation with our certified prosthetists to learn more about bionic arm options for you or your child, and explore what’s possible.