If you didn’t already know North West and Penelope Disick are mermaids in their spare time. The two cuties celebrated their birthday’s together with a mermaid themed party and the two little mermaids looked adorable.

Instagram | Carli Knox

Check out the videos below of North West and Penelope Disick having a blast with their family and friend’s at their mermaid themed birthday party then comment below and let us know what you think.

A video posted by Kim Kardashian Snapchats (@kimksnapchats) on Jun 18, 2016 at 3:37pm PDT

A video posted by Khloe Kardashian Snapchats (@khloesnapchats) on Jun 18, 2016 at 2:35pm PDT

A video posted by Khloe Kardashian Snapchats (@khloesnapchats) on Jun 18, 2016 at 2:32pm PDT

A video posted by Khloe Kardashian Snapchats (@khloesnapchats) on Jun 18, 2016 at 3:34pm PDT

Source: Us Magazine