By Cathy Carter
More than 200 children will swim, run and bike in Bethesda, Maryland Sunday, and they're doing it for kid's who can't.
Over 13 thousand children in the U.S are diagnosed with cancer each year.
Six year old Ryan Darby is one of them.
"The triathlon is in sponsor of me, cause I have cancer, and the money all goes to Georgetown," he says.
That's Georgetown Hospital where Ryan is being treated.
Sunday's kids' triathalon at the Landon School in Bethesda, will raise money for the hospital's pediatric family assistance fund.
Ryan's mother Molly Darby says their family is fortunate to have a network of support, but not every family is so lucky.
"People shouldn't have to worry about whether or not they can make their car payment when their child is sick," she says. "They should just be able to go and to be with their child and to be in that moment."
The fund also provides meals, assistance with travel, and family therapy.