here's travis cummings. >> there you go. >> reporter: it's probably one of the best gifts you can evers day. >> reporter: kelly's newborn gracie is one of many lives being unwrapped at mercy. >> we struggled with infertility. after eight years we were able to finally get our christmas miracle this year. >> congratulations. >> reporter: the nicu is always one of old st. nick's stops. >> getting pictures with these beautiful children, these wonderful children spending their first christmas in the hospital. it brings me great joy. and it brings joy to the gift of life. the gift of life is a beautiful thing. >> reporter: father christmas has been lighting up the lives of families and the hospital staff who serve them during birth for decades. >> you've been here for, like, 30 years? and it's every year. everyone's, like, i want to work on the santa day. just to have him create memories for these families that are going through this, not ideal time, it means the world to us. >> reporter: through his visits, he's left a legacy of love. >> there was a mom that we took a picture of her little