Ryan Darby says treatment for acute lymphoblastic leukemia can be tough. He gets headaches, pain in his knees and pain in his back.
"It was hard in the beginning, but I just kept working through it," Ryan says.
When he has to stay in the hospital, he says his family and friends help him through it. He says they were always there for him, watching movies and bringing him games when he was down.
That support inspired him and his mother to start a foundation.
"We're one of the more fortunate families," Ryan says. "We can afford gas and food but some families can't so we have to help out."
The foundation is called "Just Tryan It."
For three years, it has held an annual triathlon for kids to raise money to help children with cancer.
This year, 350 participants raced, raising $125,000.
Ryan recently presented a check to Medstar Georgetown University Hospital, where he's being treated.
"It takes a little bit of the load off for somebody else so they can be with their child and there's nothing more important than that," Mollie Darby, Ryan's mother says.
"They don't have to worry about where next meal is coming or if lose health insurance or who is going to take care of the other children at home," Dr. Aziza Shad, director of the Pediatric Hematology Oncology Blood & Marrow Transplantation Program at Medstar Georgetown.
Bernice Graham says Just Tryan It has allowed her to be with her 7-year-old daughter Kenyah in the hospital.
"When you're a single mom and go from working to not working, taking care of three kids at the time to have someone out there that understands ... it's amazing," she says.
And Ryan says he's "just tryan" to make treatment easier for others and his work is far from finished.
"I feel like it's my call," Ryan says.