Kim Kardashian shares more photos from her daughter's mermaid themed birthday party

Kanye West and Kim Kardashian's daughter, North West and her cousin Penelope Disick had a mermaid-themed joint birthday party on Saturday at the Kardashian-West Beverly Hills mansion. Kim Kardashian took to her website, www.kimkardashianwest.com and wrote on a blog post:

"North and P had a joint mermaid party over the weekend! They are obsessed with mermaids, so we have the party a fun "Under the Sea theme.

She talked about the mermaid costume she wore in 2012 and how they still fit.  She added:

"How cute is this mermaid costume North had on?! I had to bring out my 2012 Halloween costume, when I was a mermaid. I can't believe it still fit! 'North was in awe, and I knew I would get major "cool mom" points for wearing this.' she added proudly.