The E! reality TV beauty looked comfy and casual in a loose-fitting gray top and black pants while she joined her two-year-old little man on the nearby play equipment.
Eager to have some fun with the main men in her life, the eldest Kardashian sister took to her Twitter page, writing, "Hitting up the park with my two guys."
In other news, although Kourtney and her fellow sisters, Khloe and Kim, know all about women's fashions, it looks like their brother Rob is taking over on the must-have item for men.
Earlier in the day, the busy mom-of-two took to her Celebuzz blog page to dish on perfect holiday gifts for the guys in your life, writing, "My brother Rob‘s sock line Arthur George hit stores last month and we’re all so proud! The designs are so fun!"
"If you’re looking for a stylish and affordable gift for your brother, dad, boyfriend or even your guy friends, look no further. They are the perfect stocking stuffers and let’s be honest… guys can never have too many socks," Kourt added.