Fun in the sun! Kourtney Kardashian, 41, found a special way to entertain her three kids Mason, 10, Penelope, 7, and Reign, 5, as well as her niece North West, 7, and nephew Saint West, 4, during what appeared to be a flashback pic of them in Montana. The Poosh founder and the kiddies all cozied up in the back of her vehicle while chowing down on a bunch of delicious food.