season 3 premiere of approaches, star Kevin Costner is using self-isolation to spend quality time with his wife and kids. The two-time Oscar winner recently opened up to ET's Kevin Frazier and revealed how he's been trying to teach his kids about American history amid quarantine.Costner has been self-isolating with his wife, Christine Baumgartner, and their three children — 13-year-old son Cayden, 11-year-old son Hayes and 10-year-old daughter Grace — and he says that staying indoors has gotten harder with the weather changing.«Well, I live on the ocean,» Costner explained.