Elon Musk, the billionaire CEO of Tesla and SpaceX, made headlines once again as he attended a Formula 1 Grand Prix event in Austin, Texas, with his three-year-old son, X Æ A-12. The outing comes amidst an ongoing custody battle with his ex-girlfriend, Canadian musician Grimes, over their three children.

Musk and his son were spotted enjoying the high-octane event, mingling with fans and Formula 1 personnel. Photos and videos from the day show Musk carrying X Æ A-12 through the paddock and engaging in animated conversations with team representatives. The young boy, affectionately known as “X,” appeared captivated by the cars and the energy of the event, making it a memorable father-son outing.