Kim Kardashian shares sweet video of North West on her 3rd birthday

/ Source: TODAY

As powerful as the Kardashian moms may be, they don't have the power to slow down time to savor life with their precious babies a little longer.

Kim Kardashian expressed that sentiment herself in a sweet video she tweeted in honor of her daughter North West's third birthday on Wednesday.

The video finds mom holding her smiling little girl, who's decked out in a bathing suit.

"You're not going to get any bigger. You're not going to get any taller," Kardashian, 35, informs her daughter, teasingly. "I want you to stay little forever, okay?"

"OK!" North says gleefully.

Kardashian tweeted the video just moments after posting another "happy birthday" love note to her little one.

"Northie I love you so much I can't even explain it! Happy Birthday to my favorite mermaid!!!" Kardashian gushed.

North's aunt Khloe also shared a special birthday message for her niece.

RELATED: Kim Kardashian is Snapchatting funny North West moments — and it's adorable

The mom of two has made no secret of the fact that she adores her daughter — and gets a big kick out of her antics — taking every opportunity to share photos and videos of the future fashion icon on Twitter and Instagram.

More recently, she's been Snapchatting North's funniest moments. And, as fans know, there have been many!

Though Kardashian hasn't shown off her 6-month-old son Saint as much on social media, fans are hoping we get to see more of that little cutie soon, too.

Happy Birthday, North West — and stop growing up so fast!