Whether your child dreams of swimming with mermaids or sailing the seas as a daring pirate, an under-the-sea party is a magical way to make their birthday unforgettable. With a splash of creativity and themed supplies from The Party Factory, you can create an ocean adventure that’s fun, colorful, and full of excitement!
1. Pick Your Theme: Mermaid, Pirate—or Both! 🧜♀️🏴☠️
Decide if you’re throwing a full-on mermaid lagoon party, a treasure-hunting pirate bash, or a hybrid celebration with both. Having both themes works great if your guest list includes a mix of preferences!
Color Palette Ideas:
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Mermaid: Aqua, lavender, pink, and seafoam green
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Pirate: Red, black, gold, and ocean blue
2. Set the Scene with Ocean-Inspired Decor 🌊
Bring the sea to your living room or garden:
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Balloons in shell, fish, or anchor shapes
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Hanging jellyfish lanterns made from tissue paper
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Netting, treasure chests, seashells, and gold coins for tabletops
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Backdrops of underwater scenes or pirate ships
Explore our themed decorations at The Party Factory to make setup a breeze.
3. Dress the Part! 🎭
Encourage kids to come in costume—think mermaid tails, pirate hats, eye patches, seashell crowns, and glittery face paint. Have a few accessories on hand for kids who want to join in once they arrive.
4. Fun-Filled Ocean Activities 🐠
Keep your sea explorers entertained with fun, easy games:
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Walk the Plank – Set up a balance beam for a pirate test
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Mermaid Treasure Hunt – Hide pearls, gems, and shells around your space
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Pin the Tail on the Mermaid / Patch on the Pirate
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Message in a Bottle Craft – Kids write or draw a message and decorate their own “bottle”
5. Snack Like Sea Royalty or Scallywags 🧁
Themed food ideas kids will love:
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Fish and Chips (or goldfish crackers for a snack-size version!)
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“Seaweed” Dip & Veggies (spinach or guacamole dip)
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Mermaid tail cupcakes with candy shells
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Pirate cookies shaped like ships or treasure maps
Use our matching tableware to bring the whole table together!
6. Photo Booth Fun 📸
Set up a corner with props like pirate swords, mermaid tails, treasure chests, and themed signs for unforgettable party pics. A simple blue sheet with fish cutouts makes a great ocean backdrop.
Everything You Need, All in One Place!
From sparkly mermaid napkins to pirate party favors, you’ll find everything to bring your theme to life at The Party Factory. Browse our Under the Sea collection to start your celebration today!