Nathan Saavedra will be three in November. He needs a kidney after the last donation failed. His family lives in Carpentersville.

John Starks | Staff Photographer

Tina Saavedra holds her son Nathan, who will be 3 in November. He needs a kidney after the last donation failed.

John Starks | Staff Photographer

Nathan Saavedra will be 3 in November. He needs a kidney after his rejected the one donated him last year. His family lives in Carpentersville.

John Starks | Staff Photographer

Carpentersville resident Chris Doing donated a kidney to a 2-year-old Nathan Saavedra, but it eventually was rejected. "You just try to stay upbeat and positive and hope for the best and pray for the best," he said. "There's certainly a disappointment that it didn't work out. But no regrets."

Brian Hill | Staff Photographer

Nathan Saavedra works with physical therapist Sue Schmidt in his Carpentersville home Monday. He needs another kidney after the last donation failed.

John Starks | Staff Photographer

Nathan Saavedra will be 3 in November. He needs a kidney after the last donation failed.

John Starks | Staff Photographer

Nathan Saavedra, the 2-year-old Carpentersville boy who needs a kidney.

courtesy of the Saavedra family

Nathan Saavedra, the 2-year-old Carpentersville boy who needs a kidney.

courtesy of the Saavedra family