Gift from her son brings mom to tears.

Krystal Preston, a single mom from Fernley, Nevada, was in tears after her 13-year-old son William gave her a gift she needed but never expected. It was a car. William said the idea came to him when he was scrolling through Facebook and found someone in his area selling a car. He reached out and offered to trade his Xbox and some yard work for the vehicle. At first the owner said no, but after hearing William's story, she agreed.

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"And here I thought it was a joke," Krystal wrote. "Then I was handed the keys and paperwork on the car and I'm freaking out from shock." Williams bought his mom a 1999 Chevrolet Metro. He's the youngest of three children, but knew his mom needed a car. Krystal adds, "He may have his days, but OMG, what 13-year-old kid do you know that buys his mom a car? William, you have such a big heart and I love you."