By Brandi Fowler
Updated Sep 23, 2016 @ 6:45 pm
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North West and Penelope Disick LEAD
Credit: khloekardashian/Instagram

From their mermaid-themed birthday parties to girl talk (in their own secret language!), Kim Kardashian West's daughter North West, 3, and Kourtney Kardashian's daughter Penelope Disick, 4, keep proving they are the best of friends.

For their latest adventure, the adorable duo had a day of fun at Kourtney's house Thursday, where they enjoyed huge cones of cotton candy, and showed off the sweet treats to their aunt Khloé Kardashian. "Cotton candy!," an overall-clad North can be seen exclaiming on Khloé's Snapchat, as she walks towards her aunt while holding out her cone.

Penelope walks behind North holding up her cone as well, dressed up in a peach-colored tutu and a white tank top. "Thank you Northie! What's that P?," Khloé says to Penelope. "More," Penelope responds, sporting a braid in her hair.

Khloé and Kourtney had some fun of their own at the house with sisters Kendall and Kylie Jenner. As the siblings got together in Calabasas, Calif. to check out Kanye West's new Yeezy Boost line, they made sure to pose for a snap together as well. "Sistas from different mistas," Khloé captioned the snap.

There's nothing like a day of family bonding—and cotton candy—to ring in fall.