Leah Bitsky / Page Six: Grimes makes rare comment about co-parenting with Elon Musk - Grimes shared some rare insight into the personalities of her three kids with Elon Musk. - The singer proudly gushed over their children - sons X Æ A-Xii, 5, and Techno Mechanicus, 3, and daughter Exa Dark Sideræl ...