The facility, the first of its kind to be built inside hospital walls in the United States, is designed to help children suffering from chronic illness or serious injury.
Barb Young said she and her husband have been longtime friends of the Barton family, and she got the idea to build the facility about a year after Sophie's death.
"I have always had this passion for music therapy, and I just thought what a perfect combination to bring in Sophie's memory with music therapy and to create a special room where other people can use the power of music to heal the children, because that's what she did," Young said.
Bennington and Stone Temple Pilots gave a surprise performance before the ribbon-cutting ceremony. The group performed several songs in Sophie's Place, as the Young family, Barton's family and children at the hospital clapped and sang along. Sophie's siblings Tessa, Chas and Luke played music with some of the children before the event.
Matthew Sperry, a 5-year-old who has undergone two heart transplant surgeries at the hospital, and hospital CEO Katy Welkie cut the ribbon together.
The new facility, funded by the Forever Young Foundation, contains a recording studio, performance area, practice room and space for music therapists to provide group and individual treatment.
Steve Young said the foundation has already reached an agreement to build a Sophie's Place at Packard Children's Hospital in Palo Alto, Calif., near San Francisco, where Young played his pro career, and hopes to build more across the country. The foundation has designed a mobile Sophie's Place to travel to camps where children need therapy.
"After today, when people see what's possible, I suspect there will be a lot of interest," Young said.
Barb Young said she first became interested in music therapy 20 years ago when a friend was in a coma for over 10 months. She said many physicians at the time were hesitant to embrace the concept, but now there are music therapists in 72 hospitals nationwide. Every day, Young said, they are prescribing music therapy to children in need.
"Music therapy alleviates pain, it alleviates depression," Young said. "When you have a brain injury, the music can fire the synapses and create new neuro-pathways to help them learn to talk, to eat, to walk and to refine motor skills."
Tessa Barton, Sophie's sister, said the facility is the perfect way to honor her sister's life.
"It's obviously tragic and very sad to have Sophie gone, but she has a legacy and she's still inspiring lives and she's still around," Tessa said. "To still have her so powerfully here, it's unreal, and it makes everything that much easier. I'll be up here all the time."