Here's a joint party for a boy and girl with a pirate and mermaid theme! See more party ideas at!

Pirate & Mermaid - Under the Sea / Birthday "Ethan & Sophia's Pirate & Mermaid Adventure at Sea"

Boy-Girl Twins Birthday Party Ideas by Double the Fun Parties

Twins: Birthday Party Ideas for Boy Girl Twins

Boy-Girl Twins Birthday Party Ideas by Double the Fun Parties- **Pirate vs Mermaids

Twins Party Themes | Birthday Party Ideas for Kids / Fun themes and ideas for twins birthday parties.

Twin Birthday Party Ideas / Fun ideas for twins birthday parties - themes, games, activities and more!

A personal favorite from my Etsy shop

Mermaid and Pirates Birthday Invitations Swim Pool Party Boy girl Party Splash bash Under the sea Siblings Coral Teal Pirate Mermaid Party

20 Creative First Birthday Party Themes - At Home With Natalie

Balloon Arch around the dessert table backdrop. Love the colorful font of the child's name and the confetti around the entire backdrop- using all mix of rainbow/vibrant colors

What an adorable inventive way to celebrate boy girl, brother sister, twins, cousins, friends birthday party! Frog Butterflies nature

My Kids' Joint Butterfly & Frog Garden Birthday Party

Animal Circus Themed First Birthday Party - Inspired by This

Animal Circus First Birthday Party