The Pay It Forward Challenge

Mary Sacalis, of Mt. Laurel, New Jersey, gives Cecelia a reason to smile…literally. She pays the dental fees for a single mom-to-be who has been slowly paying off a $300 bill by giving all she can afford—$10 each month.

"This is a joke, right?" Cecelia asks when surprised with the news by her dentist. "Its not a joke," says Mary. "I thought your story was wonderful and I thought … it would be a good thing."

Mary spends the rest of her challenge money on groceries for a single mother, gas for a stranger and Target items for another stranger. She donates the remainder to a local animal shelter.

"I was beaming from ear to ear after each act," Mary says.