"Reign's bedroom is such a cozy space. My interior decorator Martyn Lawrence Bullard found this gigantic fur rug for Mason's room at my old house," Kardashian writes on her app. "We ended up putting it in Reign's new room to make it cozy—which is important when you spend so much time playing on the floor!"
And while there's a lot of light in her 2-year-old son's room, she also made serious plans for when he needs to rest.
"Reign's room gets lots of natural light, making it a great space to hang out in," she writes. "The curtains are lined with special blackout fabric so the room is dark for nap time."
Kardashian also offered a glimpse of her daughter Penelope's room last month.
"When we moved into the new house, Penelope was ready for a big-girl room, but she definitely still wanted a space that was both playful and pink!" Kardashian writes on her app. "We kept a lot of accents from her previous room, but went for a more sleek and modern feel. I even passed down the 'Love Me' neon light that was previously in my bedroom."
In addition to the cool neon light and Hello Kitty doll, Penelope has a special section of her bedroom dedicated to dolls and their accoutrements.
"This vintage Lucite clothing rack for doll clothes came from my grandmother MJ's kids clothing shop in La Jolla called Shannon + Co.," she shares. "It makes Penelope's play area look neat and organized. Toys can be chic too!"
As long as they stay on those hangers!
Images via Kourtney Kardashian's app, which is produced by Mom.me parent company Whalerock Industries.