A 10-year-old Maryland girl beating the odds thanks to a heart transplant is encouraging others to give the gift of life.When Josh and Joanna Billigmeier adopted their daughter, Paisley, they didn't know how much time they'd have with her."She's so happy, she's so vibrant that it's hard to tell that she's ever been sick, really, or that her heart struggles," Joanna Billigmeier said.Paisley is one of four children that the Billigmeiers adopted from China. Three of the four have heart conditions, but Paisley's was the most severe. The Billigmeiers met her when she was a toddler."Paisley was labeled terminal. She had half of a heart, it was on the other side of her body and it was backwards," Joanna Billigmeier said.Once the Billigmeier's adopted Paisley, she came home to Maryland, where she underwent several procedures and took several medications before she got the heart transplant that saved her life."Since then, she's been able to go to school and run around and play with friends and stuff," Joshua Billigmeier said."Our kid probably would not have made it to that Christmas, and she was given just this precious gift. She was given life," Joanna Billigmeier said.Now, the family advocates for more people to give the gift of life by becoming organ donors."By registering as an organ donor, you can give life and hope to other kids like me," Paisley said."(It's the) the thankfulness that people feel and the gratitude when they get this gift of life — and what a gift it is," Joanna Billigmeier said.Paisley and her parents share their story in commercials with the organizations Donate Life and Infinite Legacy and they raise awareness any chance they can."I think people don't realize that one person can save so many lives by being an organ donor," Joanna Billigmeier said. "We have this little girl who was dying and has had seven great years with us."