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20 Little Mermaid Birthday Party Ideas

20 Little Mermaid Birthday Party Ideas

January 20, 2025 Eric Piatt
2183 shares

Planning a birthday party can be a whirlwind, but deciding on The Little Mermaid theme takes the stress out of the occasion and brings magic and wonder straight to your celebration.

Whether you’re planning for your 6-year-old who constantly sings “Under the Sea” or you’re just a fan of Ariel’s timeless charm, Little Mermaid birthday party ideas are truly an enchanting option.

We’ll show you why a Little Mermaid-themed birthday party is the perfect idea.

From the boundless creative decor to delightful activities that transport your guests to Ariel’s undersea world, we’ve got everything covered to help you make the day unforgettable.

Planning Your Little Mermaid Celebration

Now that you’re on board, here’s how to bring this dazzling underwater theme to life.

We’ve broken it down into inspiration-filled essentials to make your planning seamless.

Decorations That Bring Ariel’s World to Life

The decor is the heart of your party—it sets the tone and immerses your guests.

For the Little Mermaid party vibe, think beachy, glittery, and whimsical.

Must-Have Decor Ideas:

  • Ocean Backdrops: Blue streamers, fish nets, and iridescent balloons can transform any room into an enchanting underwater paradise.
  • Mermaid Tail Accents: Look for mermaid tail cutouts, cake toppers, or even DIY table runners shaped like fins.
  • Seashells & Pearls: Scatter shells, pearls, and faux underwater plants as centerpieces to create an authentic sea floor illusion.
  • Bubble Garlands: Use clear balloons in various sizes to mimic bubbles floating in the sea—a stunning addition to entrances or photo areas.
  • Lighting Magic: String fairy lights or opt for soft blue lighting to give the room that magical ocean glow.

Bonus tip! Want an extra splash of magic?

Rent or create a nod to King Triton’s throne—picture-perfect for birthday snapshots!

Little Mermaid-Themed Food Ideas

No birthday party is complete without themed snacks and treats—this is your chance to bring Ariel’s oceanic world onto your guests’ plates!

Unforgettable Food Ideas:

  • Mermaid Tail Cupcakes: Adorn cupcakes with edible glitter and topper tails.
  • Sea Shell Macarons: Decorate these delicate French treats with pearl-like fillings.
  • Coral Reef Veggie Platter: Arrange colorful cut veggies in coral shapes served alongside hummus “dip oceans.”
  • Undersea Fish Food: Fill clear jars or bowls with colorful “undersea” candies like gummy sharks and jellybeans.
  • Ariel’s Cake Triumph: Order or DIY a stunning multi-tiered ocean-themed cake adorned with figurines of Ariel and Flounder.

Finished with all the food? Serve “Ocean Water Punch”!

This refreshing blue drink can be made with lemonade, blue food coloring, and soda to sparkle like real sea water.

(This post contains affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission. There is no additional charge to you! Some of the amazing following photos are not my own, click on them to head straight to the source!)

01 | BALLOON ARCH

ALLI EXPRESS . US

02 | DIY CENTERPIECE

A PUMPKIN AND A PRINCESS . COM

03 | UNDER THE SEA BACKDROP

EVENTS TO CELEBRATE . NET

04 | TREASURE CHEST

CATCH MY PARTY . COM

05 | TISSUE CORAL

@ PEEKABOO_KIDSEVENTS

06 | ARIELS TREASURES

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07 | BALLOON AND ARCH

@ INSTABALLOONS_VANCOUVER

08 | PARTY FAVOR GOODIE BAGS

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09 | MERMAID HAIR

BRITS OF BRI BLOG . COM

10 | LITTLE MERMAID PLATES & NAPKINS

SHOP CROMA . COM

You might also like…

40 Under The Sea Birthday Party Ideas for Kids

11 | MERMAID PUNCH

PLAY PARTY PLAN . COM

12 | MERMAID POPCORN

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13 | LITTLE MERMAID BIRTHDAY CAKE

ETSY . COM

14 | LITTLE MERMAID CUPCAKES

@ MARAS SWEET DETAILS

15 | CUSTOM SUGAR COOKIES

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16 | MERMAID CHARCUTERIE BOARD

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17 | CLAM SHELL MACARONS

POP SUGAR . COM

18 | SEBASTIAN ORANGE SLICE GUMMIES

A COUPLE IN THE KITCHEN . US

19 | ARIEL CUPCAKES

PINTEREST . COM

20 | DINGLEHOPPER CAKE POPS

ETSY . COM

A Little Mermaid-themed birthday party is the ultimate recipe for creating magical memories.

From enchanting decor to engaging games and delicious treats, every detail works together to craft an experience your child and guests will love.

But if all these ideas seem a little overwhelming (or you simply want it to be just right), don’t hesitate to seek help.

Dive in and have fun! After all, this is your chance to bring fantasy to life, full of singing, laughter, and an under-the-sea wonderland.

Happy Celebrating!


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Planning a celebration can be exciting, but it can also quickly become overwhelming. Luckily, Lady Celebrations is here to help you plan stress-free gatherings all year long. From birthdays to ugly Christmas sweater parties and everything in between, Lady Celebrations offers expert advice and practical tips to take the stress out of your planning!

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Hi y'all! I'm Jessica, and along with my husband Eric, we're the ultimate party enthusiasts! You know what I enjoy even more than attending an amazing party? Throwing one that's unforgettable!

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