It's been a big week for the Kardashian kiddos. Penelope Disick turned 4 , and she and North starred in possibly the cutest Instagram video, ever . Now it's time for Saint West to get involved. Kim Kardashian and Kanye West's baby boy made a rare appearance on social media yesterday. Kardashian can be seen smooching her son in a video posted to her Snapchat account, and the adorableness factor is strong. We would not be mad if he and Luna Legend one day fell in love. No pressure, babies.