In the video, baby Saint can be seen lying on a silky white blanket, looking cute and comfy in a white zip-up onesie. As Kim tickles him with a stuffed animal toy, Saint cracks a smile before laughing uncontrollably.
Earlier this week, the 35-year-old reality star was a guest at the #BlogHer16 exposition in Los Angeles, where she addressed what it's like raising two kids in an "abnormal" time. Along with Saint, Kim and Kanye are also parents to 3-year-old daughter, North.
"In this world, it's like if you didn't post it, it doesn't exist," Kim dished. "People literally thought Saint didn't exist. They thought I had a whole fake baby because I wasn't posting about [him]. It was ridiculous."
While Saint's sister has gotten a ton of air time on mom's Snapchat -- playing with filters and saying, "No pictures!" -- the newborn has just recently started making appearances on the popular app.
Last month, Kim shared a video of Saint sitting in a stroller, rocking a dapper ensemble (that we're sure was Kanye-approved!), completed with a bib and an adorable smile.
Relive that precious moment in the video below.