Khloé Kardashian’s kids are having a blast as they celebrate their cousins’ birthdays!

Over the weekend, the Good American CEO shared a few photos on her Snapchat Story of her daughter True, 5, and son Tatum, 18 months, as they celebrated her nephew Aire and niece Stormi’s birthdays.

Tatum could be seen talking to Kim Kardashian’s son Saint as they stood together at a coloring station, while True spent some time with Rob Kardashian’s daughter Dream as they played with slime together. “Slime is happiness,” Khloé wrote across the photo.

Khloé later captured her son as he ventured onto the dance floor, wearing a brown jacket and jeans, and she also snapped a picture of Dream as she headed to a giant pit filled with stuffed animals.

On Monday, Kim, 43, posted a few behind-the-scenes clips from both Stormi’s 6th birthday and Aire’s 2nd birthday celebrations over the weekend.

In Kim’s first Instagram Story post, she filmed an unidentified partygoer dancing and wearing an Astroworld-inspired head of Aire. She then shared a snapshot of some of the party’s sweet treats, including cloud and lightning bolt-shaped cotton candy.

The Kardashians star also shared a video of the party’s tent and the indoor amusement park ride for the kids to enjoy. The ride had small enclosed seats in the shape of kites circling in the air.

Kim published a photo of the decorations, which included a freeway-inspired sign that read “Aire 2” and “Stormi 6.”

The mom of four also shared a video of herself at the party, playing with Instagram filters and showing off her casual party look. “No filter,” she jokingly captioned the video.

Her sisters’ posts follow Kylie Jenner’s “Birthday Week” celebrations for her two children. The mother of two published Instagram Stories documenting her preparation for Aire’s birthday. She showed off the large bags of colorful balloons that she carried throughout her home.

“Round 2 but now i have a partner @maguireamundsen,” Jenner captioned the clip. She also spoke behind the camera while sharing a close-up of the balloons, saying, “Round two.”

Jenner’s posts followed her daughter’s birthday celebrations. She shared a similar video on her Instagram Story earlier that week, where she dragged a large bag of balloons up her staircase and giggled as the decorations got stuck.

“Let the birthday week begin,” Jenner wrote over the top of the clip.

Jenner later published another clip of the balloons, this time covering the floor of a room in her home. Stormi’s presents were placed on a white ottoman in the center of the room and put neatly into three piles.