In April, Ric Jackson helped a neighbor who had been looking for someone to fix the brakes on his daughter's bicycle.

"I fixed it up. He took it back. And she was thrilled and he was thrilled," Jackson said. "And it's just mushroomed."

An avid cyclist and retired mathematician, spent the rest of the year fixing more than 650 bicycles for friends, neighbors, and strangers.

"If you clean off the dirt from the tires, put new handgrips on," Ric said, "before you know it, it will be … something that will just delight the heart of some little girl someplace."

One father sent him a message after picking up a freshly fixed bicycle, "Thank you for the wonderful gift today. We had a great daddy-daughter bike ride and she was all smiles."

"That's the kind of thing that makes my day," Jackson said. "That's my reward."

Read more at CBS News

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