• Tesla and SpaceX CEO Elon Musk is known for keeping his private life largely under wraps.
  • He gave us a glimpse into it Sunday, however, by posting a video of his son playing piano at a seniors home in Pasadena, California.
  • You can watch a video of the younger Musk playing below.
  • Visit Business Insider’s homepage for more stories.

Elon Musk, the billionaire CEO of Tesla and SpaceX, gave us a glimpse into his family life on Sunday by posting a video of his son playing piano at a seniors home.

“Took my son to play piano for the seniors home in Pasadena,” Musk tweeted. “It was lovely to see them smile.”

Upon the request of a follower, Musk also included a 31-second clip of his son playing a classical piece on a grand piano.

Musk did not name the piece, but it appears to be “Deux Arabesques” by Claude Debussy, a French composer active around the end of the 19th century.

You can watch it here:

Musk has five sons with his first wife, Justine. It's not clear which son was playing the piano or how old he is. Musk is known to be private about his personal life.

Now worth $22 billion, Musk has made his philanthropic side known in the past. In 2012, he vowed to donate most of his wealth during his lifetime and has made many sizable donations to causes he cares about in past.

In 2014, Musk cofounded a small school named Ad Astra - Latin for "to the stars" - in Hawthorne, California, for his children. The school's curriculum includes artificial intelligence, ethics, and building things from weather-balloons to battle-bots.

Sports and music, however, are not included.