At 13 years old, Jack Berg loved playing football and lacrosse and helping others.

He had a big heart in the small town of Pine Colorado

"He didn't like others being hurt," his mom, Sandy Berg, said. "He took the time to teach someone who wasn't as athletically inclined how to throw a spiral at lunch."

He was a tough seven grader.

Then one day, the unexpected happened. Suddenly and tragically, Jack died.

"I lost my youngest child, but he's in my heart," Sandy said.

Even in death, Jack would still help others by donating his organs.

His heart went to an 11-year-old girl named Abby in Utah whose own heart had failed.

Sandy got to meet that girl and was able to hear her son’s heart beat once again.

Abby sent a video of Jack’s heart during an exam at the hospital.

“…all of sudden there it was.... and you start to cry...because that's your baby's heart," Sandy said.

Sandy also traveled Wisconsin to meet another recipient.

This time it was a 64-year-old grandmother named Calista Van Airsdale. She needed a kidney.

Once again, Jack came to rescue.

Sandy says the grandmother said, “… how were you when you found out your son’s kidney went to a grandma?'"

"I never even thought about that," Sandy said. " He could help somebody. They were a perfect match.”

Sandy Berg and Abby want others to know, donating organs saves lives.

They will both run in Denver's Donor Dash on Sunday at Washington Park.

One of the donors who will be remembered at the race, Jack Berg.

That little kid from Pine Colorado may be gone.

But his heart and spirit of his will never die.