Our Mermaid Under-the-Sea Party
“How to Throw the Ultimate Ocean-Themed Party”
So you’ve officially decided to go full Little Mermaid mode and throw an Under the Sea party for your kiddo? Or hey, maybe it’s a baby shower. Or a just-because-I-love-mermaids-and-needed-a-reason-to-party situation—which, honestly, same. Zero judgment. Whatever the occasion, just know this theme is chef’s kiss. It’s dreamy, colorful, a little sparkly, and 100% guaranteed to make people say “aww” at least five times.
But here’s the real win—it’s actually super doable without draining your wallet. Like yes, it gives expensive Pinterest vibes, but you can totally pull it off with a Target run, a few dollar store hacks, and maybe a glue gun that’s seen some things. It’s one of those themes where even simple stuff looks extra magical—think paper jellyfish, streamers that look like seaweed, and cupcakes with little candy pearls. Pure ocean-core cuteness minus the chaos.
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!
What’s So Great About Under the Sea Parties? Literally Everything
Okay, first off—can we talk about why this theme is basically a mom’s ride-or-die? It’s fun, it’s colorful, and most importantly… it *gets you.* Like, whether your kid’s out here living their best mermaid fantasy or just obsessed with splashing in puddles like it’s a sport, this theme totally delivers. You can go all-in with glittery fins and seashell crowns or keep it chill with ocean critters and beachy vibes. It’s versatile like that. Baby shower? Yup. Birthday bash? Absolutely. Random Tuesday with too much craft glitter? Honestly, still works.
Credit: Under the Sea Kids Party Ideas by Bright Star Kids
With a little DIY magic and a few dollar store hacks that will literally change your life, you can fake that “enchanted underwater palace” vibe without selling a kidney. Like yes, Chrissy threw Luna a mermaid party that looked straight out of a fairytale… but we’re here to recreate that look with a $5 budget and a prayer—and honestly? Still a serve.
Our Mermaid Under The Sea Birthday Invitations
Before we dive into the glittery goodness of decor, snacks, and mermaid-core fashion moments, we gotta talk invitations. I know, I know—it’s not the flashiest part of party planning, but trust me, it sets the whole vibe. It’s like the party trailer before the blockbuster movie. And listen… custom invites? Cute, yes. But also: why are they $50+?? For real. That’s grocery money. That’s like, two and a half Starbucks runs. And let’s be honest—most guests will look at it once, think “aww, cute,” and then it disappears into the void that is their kitchen counter or diaper bag.
So instead of spending way too much on something destined to live a short life under a stack of coupons, let me hook you up with something better, FREE “Under the Sea” invitation templates. Yep, I said free-fifty-free. You can download, customize, and send them out faster than you can say “Dinglehopper” (or “please RSVP by Friday, Aunt Linda”).
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.
Whether you’re texting them out, printing a few for keepsakes, or sliding them into those fancy mermaid-scale envelopes you just had to buy, these invites are the perfect kickoff to your party planning adventure. Plus, saving money here means more room in the budget for important things… like cake. Or glitter. Or a last-minute Target run where you “just needed one thing.” You know how it goes.
CUSTOMIZE AND DOWNLOAD NOW ON CANVA!
How to Use (and Print!) Our Free Templates Like a Pro
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.
A. To download and edit your template:
- Scroll up to the big blue “Edit Template” button and click it.
- It’ll open in Canva—no design experience needed!
- Personalize it: name, age, date, time, colors—make it yours.
- When you’re done, go to File > Download > PNG (this format looks crisp for printing).
- Save and you’re ready to print!
B. Printing Tips:
- Open the saved file on your computer.
- Use a color printer (or print at a local shop).
- Play around with print sizes—sometimes “Fit to Page” cuts edges, so test first.
- Print, admire, and maybe do a little superhero victory dance.
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.
Making Your Living Room the Ultimate Mermaid Hangout
“DIY Decor Tips That’ll Make Your Party Sparkle”
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.
Credit: Mermaid Under the Sea Party by Live Like You Are Rich
There’s this dreamy balloon garland in every Pinterest inspo pic—blue, teal, maybe a little sparkle—cascading down like an ocean wave. Looks pricey, right? Plot twist: it doesn’t have to be. Just grab a mix of blue, white, and clear balloons (bonus points if you add a few with confetti inside), and boom—you’ve got yourself an ocean vibe wall. Toss up some cheap fishing net and dollar store seashells for that “oops, I found treasure” energy.
Credit: Under the Sea Birthday Party Ideas via Greenvelopes
Add sea creature cutouts (think fish, jellyfish, and maybe a sassy crab or two), and it’ll look like your living room turned into Bikini Bottom. And if you really wanna flex, a bubble machine will take it to the next level. Bubbles = instant underwater magic. Kids lose their minds. Adults low-key love it too. 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.
Under the Sea Eats That’ll Make a Splash
Let’s be real—half the reason we throw parties is for the snacks (don’t lie, you know it’s true). And when you’re going with an “Under the Sea” theme, the food is where you can really have fun and get aesthetic. Picture this: a dessert table dripping in sea vibes—mermaid cupcakes with edible pearls, sugar-dusted starfish cookies, and a shimmery blue punch that looks like it came from Ariel’s personal stash. It’s giving ocean magic. It’s giving Pinterest goals. And honestly? It’s giving “I put way more effort into this than I’ll admit.”
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.
Don’t Skip The Games & Crafts So Fun, Even Ariel Would Join
“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
Laid them out on a small table with crayons, markers, glitter glue, and some ocean-themed stickers I snagged from the dollar store.We called it the “Deep Sea Art Studio,” and let me tell you—it was a total hit. The kids were obsessed, and it gave them a quiet little break from the sugar-fueled chaos. Plus, they got to take their masterpieces home as mini party favors. Ten out of ten, highly recommend.
Closing the Seashell on a Magical Day
If you want to keep the kids happily entertained and give yourself a moment to sip a juice box in peace, set up a little coloring corner. I printed out a bunch of free ocean-themed coloring pages (think mermaids, sea turtles, smiling jellyfish—the whole aquatic crew), laid them out on a small table with crayons, markers, glitter glue, and some ocean-themed stickers I snagged from the dollar store. We called it the “Deep Sea Art Studio,” and let me tell you—it was a total hit. The kids were obsessed, and it gave them a quiet little break from the sugar-fueled chaos. Plus, they got to take their masterpieces home as mini party favors. Ten out of ten, highly recommend.
