OVERLAND PARK, Kan. (AP) — A man who's mowing lawns for free across the country is trying to teach children about making a difference through acts of kindness.

KMBC-TV reports that Rodney Smith Jr. is traveling the U.S. with a mower and trimmer as part of the 50-Yard Challenge, which encourages children to cut 50 lawns in their town for free. He's stopping in Overland Park after learning about an older couple who needed help with yard work.

The challenge stems from Raising Men Lawn Care Service, Smith's yard maintenance program focused on helping elders, disabled people, single mothers and veterans. His mission began when he stopped to help an older man he saw struggling with a lawn mower.

Participants of the challenge receive a different color T-shirt for every milestone and a new lawnmower if they complete the 50 yards.

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Information from: KMBC-TV, http://www.kmbc.com