Auntie Khloe gives us a peek inside the Kardashian kids' playtime

We already figured that Khloe Kardashian is the "fun" aunt.

And this video she posted of her nieces having the time of their lives makes us think that they feel the same. Khloe spent some time with North West and Penelope Disick, and while we're not quite sure what they're doing, life is good for these two tiny tots.

"Like a diamond," Kardashian captioned the video on Instagram, in which the girls are seen having a grand 'ol time and saying the word "diamond."

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