When a 17-year-old California girl was able to scramble to freedom and alert the police of her 12 siblings being held captive in their own home earlier this year, the Turpin family made headlines around the country.

As Dearly previously reported, David and Louise Turpin allegedly held their 13 children captive, all the while inflicting torture upon them. The children were chained to furniture, starved, and only allowed to shower twice a year, among other grisly details.

When authorities found the siblings — aged 2 to 29 years old — they were found surrounded by carpet covered in their own urine.

However, since their rescue, the Turpin siblings have been on a journey of rehabilitation. The seven eldest siblings are using music therapy as a bid for healing, according to CNN, which includes learning to play their own instruments.

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Upon hearing this, Yo-Yo Ma, already in California for another event, decided to visit the Turpin siblings in the hospital. The world-famous cellist gave a free 30 minute performance, which surely left a lasting impact on them. Mark Uffer, CEO of the Corona Regional Medical Center said:

“They were just amazed, awestruck by the level of talent. They really enjoyed it.”

Although there are no traces of Ma's performance on his social media or personal website, the Turpin's attorney Caleb Mason confirmed the performance, as well as the positive progress the eldest siblings are already making. Mason said:

“For the first time in their lives, they have choices that they can make, from the mundane, like what to eat, what to wear or whether they should kick the soccer ball around. They are getting into all sorts of activities like that. t's just great to see them enjoying the freedom to make choices.”

He added:

“All of their health issues have improved since they came here. They are in a better place now.”

The children's parents, David and Louise Turpin, are being held on charges of child endangerment, false imprisonment, and torture. They each face up to life in prison if convicted.