Look at baby Mason, before he had his gorgeous long hair!
Mason looked so much like uncle Rob Kardashian when he was a baby!
The Kardashians may be a glamorous family, but Kourtney is happy to be hands on at the playground.
A Keeping Up with the Kardashians spin-off we wouldn't be opposed to: all Mason, all the time.
Penelope Disick has the best bathing suits! And best forearm fat.
Mason Disick has very high minded taste in food, of course.
Penelope Disick started out her life as a very chubby-faced little lady.
Mason is just as happy in the city as at home in southern California.
Don't bring Mason around any sprinklers, okay? He doesn't like messing up his hair.
Luckily, he's gotten used to getting splashed by his silly family.
Of course Penelope Disick was on hand for the Kimye nuptials! Kourtney posted this pic of mom and daughter enjoying some ice cream in Paris.
Mother and son often wear complementary outfits while out on the town.
Look at that sassy sailor pose! Mason proves he's a Kardashian through and through with his Instagram style.
Kourtney openly breastfed Penelope while on vacation.
Peneloep perfected an expression of distaste for the paparazzi early on.
No one throws an Easter celebration like Kris Jenner. Kourtney praised her own mother for giving her kids such wonderful Easter memories.
Kourtney snapped this pic of daughter Penelope holding hands with Larsa Pippen's daughter. How sweet!
And here he is touching his little sister Penelope for the first time. Doesn't your heart just explode?!
When Mason was introduced to his sister for the first time, Kourtney told him her name was Penelope. He gave this crazy-cute response.
Penelope looks more and more like brother Mason every day!
Kourtney and Mason both appreciate a black riding boot.
Kourtney transformed into the most chill, bohemian one of the Kardashian sisters after having a baby.
Who could ever forget watching Kourtney Kardashian pulling out her child—twice!—on Keeping Up with the Kardashians?