Make a Splash with This Ultimate Mermaid Party Planning Guide

Published on Aug 30, 2025
Is your little one dreaming of an underwater birthday celebration filled with magic, mermaids, pearls, and all things whimsical? You're in the right place. We have everything you need to create an unforgettable mermaid-themed party that your child will treasure forever. From themed food and decor to underwater games and activities, we’re here to guide you in throwing the perfect party!
Food
Let’s dive into your mermaid-themed party food.
Beverages
Serve water labeled “Freshwater” and blue lemonade as “Seawater”.
Gummies
Incorporate themed gummies into your party. For shark and sea creature gummies, simply place them in a bowl and label them as they are. For snake gummies, try labeling them “Sea Snakes” or “Fish Bait.” Donut-shaped gummies (especially the orange ones) can be named “Life Preservers” or “Floaters.”
Veggies
Get creative with veggies in your mermaid food by using fun labels! Slice cucumbers and label them “Sea cucumbers.” If you’re serving a dip with crackers or chips, call it "Seaweed dip" (bonus points if your dip has some green in it!).
Seashell Pasta
Serve pasta shaped like shells, whether it's mac and cheese, pasta salad, or any other dish. Name it "Seashells and cheese," "Sea pasta," or "Sea salad."
Pearl Chocolates
Look for small, white, sphere-shaped chocolates that resemble pearls. If you find them, serve them as “Pearls” or “Mermaid tears.”
Driftwood Pretzels
Purchase straight salted pretzels (not chocolate-covered kind!) and serve them labeled as "Driftwood."
Ariel’s Treasures
Buy gold chocolates coins and place them in a toy treasure chest, labeling them “Ariel’s treasures” or “Pirates’ treasures.” You can also add edible candy bracelets to your treasure chest for variety.
Fish Snacks
Serve a variety of fish snacks like goldfish crackers, chocolate-covered fish crackers, and fish gummies, at your mermaid party!
Dinglehoopers
What mermaid theme party is complete without Dinglehoopers? If your child loves Ariel, set out forks in a container labeled "Dinglehoopers."
Decor
Mermaid Color Palette
Choose a color palette for your decorations to unify the party aesthetic. Opt for colors like pink, coral, and pastel shades of purple, green, and blue or pick your child's favorite color as a base for a pastel palette.
Show Them the Mermaids
Start getting your guests in the mermaid space with a mermaid welcome sign saying “Mermaids this way” or “Welcome to my Sand Castle.”
Corals, Seaweeds, and Fishnet
Decorate your space with green and blue crepe paper to mimic seaweeds and corals. Use decorative fishing nets for decoration from online stores as a backdrop for birthday greetings and as table runners. You can also create a photo wall using these nets by hanging one or two on the wall and clipping pictures of your kid growing up.
Activities
Paint Seashells
Set up an art corner for crafty kids! Provide ready-to-paint kits for seashells, mermaid tails, or treasure chests. There are many mermaid or under-the-sea themed paint kits on internet shopping platforms, so you’re sure to get a lot more themed items to paint!
Make Mermaid Bracelets
Who says candied bracelets are all the little mermaids are gonna get? Have the little one create their own bracelets, bonus points if you get the beads in the mermaid color palette!
Put the Pin on the Mermaid
Revamp the classic party game "Pin the Tail on the Donkey" using a mermaid theme. And make sure the mermaid tail follows the colors of the party palette!
Mermaid Treasure Hunt
What’s a mermaid theme party without channeling Ariel's curious explorer spirit? Hide mermaid treasures and get the kids embark on a treasure hunt! You can hide items like a plastic pearl necklace, more gold coins, seashells, big pearls, gemstones, seashell-shaped mirrors, combs, sunken ships, and other sea-related toys.
Make a Take Home Beach
Let little mermaids create their own mini beach to take home. Provide glass jars, sand, seashells, and mini sea creature toys for them to assemble.
Swimming
If your space and budget permit, allow the kids to play in a pool! Take it a step further by adding shell and fish floaties—after all, mermaids need their friends!
Loot Bag
And if you’re having a swimming party anyway, why not give out a functional loot bag? You could include a towel, travel sunscreen, a mini aftersun gel, a waterproof bag, or a resealable bag for wet swimsuits after, and maybe even kiddie goggles. Pack them all in a reusable produce bag you can buy from online shopping platforms. They look like fishnets, so they’ll suit your theme. I promise all the parents will love this!
And that’s all we have for a mermaid theme party! Don’t forget to have a magical time!

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Hannah is a contributing writer for Smart Parenting and an educator. When not writing, she loves reading, taking cat naps, and people-watching as she invents little stories about them in her head.