meet sophie. 30 pounds of molten cuteness.ng this 3-year-old motor around her minnesota home you would never know she was born with half of a functioning heart. >> how old was she when she had the first surgery? >> four days. >> four days. so her heart was the size of -- >> a wall nut. yeah. >> we got to see it beating inside her chest before they closed it up too. >> really? >> yeah. >> are you wearing lipstick, or are your lips mnaturally that rosy. >> they're usually nice and blue. >> oh, sophie. >> after three open heart surgeries she's doing well, but odds are she will still need a heart transplant to sur vaif into adulthood, like coulter. >> action figures. >> born with the same condition, he has had two transplants. >> that heart is not going to wait much longer. i'm getting it. >> reporter: is he now on his third heart at age 10. hang around with kids like this, and you can't help but marvel at the medical talent that can hold off a genetic death sentence, but hang around with the medical talent at the mayo clinic, and