Under the Sea Baby Shower & Birthday Bash
“How to Throw the Ultimate Ocean-Themed Party”
So, you’ve decided to go full “Little Mermaid” and throw an Under the Sea-themed party for your little one? Maybe it’s a birthday. Maybe it’s a baby shower. Maybe you just really love mermaids and needed an excuse to throw a party. No judgment here. Whatever the occasion, let me tell you—this theme is pure magic. It’s colorful, whimsical, and ridiculously cute. But more importantly, it’s mom-friendly because it can be done on a budget without looking like it was.
Credit: Under the Sea First Birthday Party by inAra By May Pham
I’ve been in the party-planning trenches, and I know how crazy expensive things can get. But don’t worry, mama—I’m here to help you create a Pinterest-worthy party without the Pinterest price tag. From budget-friendly decor hacks to free, stunning invitation templates (because, let’s face it, those custom invites can cost more than a whole cake), I’ve got you covered. So grab your snorkel and let’s dive into the ultimate Under the Sea baby shower and birthday party guide!
Why Moms Are Obsessed with “Under the Sea” Parties
First of all, let’s talk about why this theme is a mom’s best friend. It’s fun. It’s colorful. And best of all? It’s versatile. You can go full-blown mermaid fantasy or stick to a more classic ocean theme with cute sea creatures. Whether your little one dreams of being Ariel or just likes splashing in puddles, this theme works for both baby showers and birthdays.
Credit: Under the Sea Kids Party Ideas by Bright Star Kids
It’s also a Pinterest favorite. If you’ve ever fallen down the rabbit hole of scrolling through party inspiration at 2 AM (we’ve all been there), you know how stunning these parties can be. But here’s the best part—you can recreate that look WITHOUT spending a fortune. You just need a little creativity, some DIY magic, and a few dollar store hacks that will change your life.
Even Hollywood moms are jumping on board. Remember when Chrissy Teigen threw her daughter, Luna, a mermaid-themed party that looked like it was straight out of an enchanted underwater castle? Yeah, we’re not doing that. But we can totally fake it.
Splash-Worthy Invitations That Won’t Sink Your Budget
Before we get to the fun stuff like decor, food, and mermaid-approved outfits, let’s talk invitations. Custom-designed invitations are cute and all, but they also come with a price tag that makes me question my life choices. Do we really need to spend $50+ on something that people are going to glance at once and then immediately lose under a pile of junk mail? No. No, we do not.
That’s why I’ve got you covered with FREE “Under the Sea” invitation templates that you can download, customize, and send out faster than you can say “Dinglehopper.” These invitations are absolutely adorable. Think pastel ocean waves, cute little mermaids, and tiny sea creatures that look like they came straight out of a fairytale.
They’re also super easy to edit—just add your party details, print them at home, or send them digitally if you’re feeling fancy. Want to make them look extra professional? Print them on glossy cardstock. No one will ever know they were free. And let’s be real—saving money on invitations means you can spend more on cake. Priorities, people.
DOWNLOAD FREE EDITABLE PDF INVITATION HERE
Beginner’s Guides
Before you get too wrapped up in planning the rest of your party magic, let’s talk about invitations! Our free invitation templates are not only adorable, but they’re super easy to customize too. Whether you’re adding in party details like the date, time, and location or even a special note, you can personalize everything to fit your theme perfectly.
Want to know how? Click this link for simple Beginner Guide and a step-by-step guide on How to Easily Customize your PDF invitation. Trust me, you’ll have them ready to send out in no time, and they’ll look as fabulous as the digital design itself! Ready to get started? Let’s make those invites sparkle!
Speaking of birthday parties, we avoid to see anything basic, especially when it comes to children’s birthdays. By unusual, I mean something that isn’t typical Disney theme, but rather something like what’s in this page or Under The Sea, Cute Under the Sea and Enchanted Watercolor Under the Sea birthday invitation templates.
From Living Room to Ocean Dreamland
“Easy & Affordable Décor Hacks”
Alright, now that the invites are sorted, let’s get to the fun part—decorating. You don’t need to rent out an aquarium or hire a team of professionals to make your home look like an underwater dreamland. With a little creativity (and a trip to the dollar store), you can DIY your way to a stunning setup.
You walk into a room draped in flowing blue streamers that look like waves. Glittery jellyfish float from the ceiling, shimmering in the light. There’s a gorgeous balloon garland in shades of blue and teal, cascading like the ocean tide. Sounds expensive, right? Nope. Here’s how you do it without breaking the bank:
Credit: Mermaid Under the Sea Party by Live Like You Are Rich
Use blue and white balloons to create an ocean wave effect along the walls. Hang fishing net and seashells for that “found treasure” vibe. Scatter sea creature cutouts around the space to make it look like fish are swimming through the air. And if you really want to go all out, grab a bubble machine—because nothing screams “underwater magic” like bubbles floating around the room.
Credit: Under the Sea Birthday Party Ideas via Greenvelopes
For a cute DIY touch, take paper lanterns, glue some ribbon tentacles on them, and boom—instant jellyfish. Want an extra glow? Paint them with glow-in-the-dark paint for a stunning nighttime effect. If you’re hosting the party outside, even better. Hang blue streamers from the trees, set up a kiddie pool filled with plastic sea creatures, and let the kids splash around like they’re in the real ocean.
Mermaid Munchies & Ocean Treats
Let’s be honest—half the fun of throwing a party is the food. And when you’re doing an “Under the Sea” theme, you have so many ridiculously cute options. Imagine a dessert table filled with mermaid cupcakes topped with edible pearls, starfish-shaped cookies dusted with sugar, and a shimmering blue punch that looks like it was scooped straight from the sea.
Credit: Mermaid Cupcakes by Cakestone
Want something easy? Goldfish crackers in cute little snack cups. Boom. Instant ocean-themed treat. Feeling creative? Take mini sandwiches, stick some pretzel sticks in them, and suddenly you’ve got adorable little crab sandwiches. Mermaid popcorn is another easy win—just drizzle white popcorn with blue and purple candy melts, sprinkle some edible glitter on top, and you’ve got a snack that looks straight out of Ariel’s treasure trove.
And let’s not forget the cake. If you’re not up for making a full-on masterpiece, don’t worry. A simple blue ombré cake with edible pearls will look stunning with zero stress. But if you want to go all out? Get a mermaid tail cake topper, add some edible seashells, and suddenly your cake looks like a million bucks (without actually costing that much).
Keeping the Little Fishies Busy
“Under the Sea Party Games & Activities”
Look, we all know kids have the attention span of a goldfish. So, keeping them entertained is priority number one if you don’t want your house to turn into a shipwreck of hyperactive toddlers. Who knew that a pack of crayons and some adorable Under the Sea-themed coloring pages could be a total lifesaver? Trust me, when those sugar rushes hit, sitting them down with some mermaids, sea turtles, and fish to color will feel like the greatest parenting hack of all time.
Credit: 20 Starfish Coloring Pages by Monday Mandala
Pro tip: Print out free ocean-themed coloring pages in advance, throw them on a table with crayons and stickers, and call it the “Deep Sea Art Studio.” Boom! Instant entertainment. Bonus points if you let the kids take their masterpieces home as a party souvenir.
Wrapping Up Your Under the Sea Extravaganza
Whew! You did it, mama! You pulled off an Under the Sea baby shower or birthday party that would make Ariel herself jealous. From the decorations to the free printable invitations (because who doesn’t love free stuff?), and the adorable games that kept the kids entertained, you’ve created a day to remember.
So, as the tiny mermaids and sea creatures head home with their hands full of coloring pages, treasure hunt goodies, and cake crumbs on their faces, take a moment to soak it all in. You made magic happen. You created memories. And, most importantly, you survived the sugar-fueled madness with your sanity (mostly) intact. Now, pour yourself a glass of something bubbly (and I don’t mean the bubble station solution), kick back, and bask in the glory of a job well done. Cheers to you, party-planning queen!
