MILWAUKEE, Wis. (WBAY) - As the holiday season approaches, a Fox Valley family supports their son as he continues recovery with the national leader in physical medicine and rehabilitation, the Shirley Ryan Ability Lab in Chicago.

As we first told you back in July, 15-year-old Brett Jedwabny of Appleton suffered a traumatic brain injury in a power-washing accident.

Brett continues to regain abilities with his family by his side.

Six months removed from a life-altering brain injury. Brett Jedwabny is walking nearly every single day in physical therapy; something doctors early on told him he would never do again. But that all changed when he arrived in Chicago.

"When we talked to our doctor here at Shirley Ryan Ability Lab, our lead doctor here, he said 'Wait a minute, we're not saying that, we are going to work tirelessly at it,'" said Tyler Jedwabny, Brett's dad.

Brett, alongside his parents Tyler and Nicole, and his little brother Grant, work with therapists every day, relearning movements and muscle memory and making strides in the process.

"He's doing a lot better job walking, rolling in bed, getting in and out of bed, those are things we've been practicing a lot," said Sarah Lipscomb, a Physical Therapist at Shirley Ryan Ability Lab.

Brett's new challenge here at the Shirley Ryan Ability Lab is starting to sit on his own without any support. This is something therapists say he started doing in a sling, but now as you can see, he's starting to do it all by himself.

During a visit from Action 2 News, the family tells us this is the first time Brett sat without support since the accident. Doctors and therapists encourage the family to cheer on every victory.

"They want you to celebrate every single step of the way, even when it's something small, because it means something big," said Tyler.

"In therapy when I go there, he does a lot more, that makes me want to be there for him more and help out more," said Grant Jedwabny, Brett's brother.

"I still sometimes have those visions of what I saw the day of the accident, and I look back at pictures from July 9, and now the growth that he's made and that he is making right now," said Nicole Jedwabny, Brett's mom.

With Brett expected to stay in Chicago, the family quickly realized this year's Christmas would be celebrated in the hospital.

"It's going to look different. We don't have a tree at our house, matter of fact we can't even go to our house. It doesn't matter where this Christmas would have happened. This Christmas is special because it's us four," said Tyler.

The support for Brett does not stop with family.

"As of early this week, these are the countries that we've now gotten, we officially know a third of the people we've got cards from," said Tyler.

While many do not personally know the Jedwabnys, they are sending prayers for Brett's growth, telling him he's truly an inspiration, making a difference with every step he takes.

"We would not be here if we didn't have our faith, and the support of other people from all different aspects of different religions of people that have come together to pray for us," Nicole said.

"As tragic as it is, his journey has kind of inspired other people, I know it's inspired me, pushed me to become the best dad I can for him," said Tyler.

This Christmas season a family serving as a reminder of what matters most and that miracles do exist.

Brett Jedwabny is attacking every single day.

"Here he is, walking, standing, sitting up on his own, saying 'Mom, I love you, Dad I love you, that's Brett strong," said Tyler.