Planning a first birthday bash for your little guy? These 35 first birthday themes for boys are playful, creative, and full of fun — perfect for making his big day as memorable as his very first cake smash.
35 First Birthday Theme Ideas for Boys That Are Adorably On-Trend in 2025
Turning one is a milestone worth celebrating in style—and in 2025, first birthday parties for boys are all about playful details, sweet nostalgia, and themes that bring big smiles. Whether you’re going bold or keeping it charmingly simple, the right theme makes the day unforgettable.
From wild adventures to classic characters, these 35 first birthday theme ideas for boys will help you plan a celebration full of joy, creativity, and cake-smudged memories.
1. Under the Sea & Turning One
A splash of aqua, swirls of watercolor, and the shimmer of that “one” balloon — this ocean-inspired celebration by @bsk_party_shop is making serious waves. The cakes are artfully marbled like seafoam, while touches of coral and seagrass bring a whimsical tidepool vibe to the table.
And those lush florals? Like little bursts of undersea magic blooming above the surf.
It’s cool, creative, and the perfect way to celebrate a little one’s first trip around the sun — with ocean eyes and sandy toes.
2. Gian’s “Fast One”
Ready, set, one! @partydecorla brought the pedal to the pastel for Gian’s first lap around the sun — and we’re obsessed. With retro racing vibes, checkered flag details, and soft shades of mint, lemon, and sky, this setup is as playful as it is polished.
From the racer Mickey cutout to the layered cake podiums, every detail screams speed with style. And those balloon towers? A whimsical take on turbocharged flair.
For the littlest speedster with the biggest finish line — this “Fast One” celebration is full throttle fun.
3. Nova’s Berry First Bash
It’s a berry special day for little Nova, and @partydecorla brought all the charm! With pops of strawberry red, pastel pinks, and vintage Strawberry Shortcake cutouts, this outdoor celebration is bursting with fruity fun and nostalgic flair.
The balloon garland feels like a cascade of whipped cream and berries, while the red plush carpet adds the perfect touch of cozy luxe. Every detail is juicy, joyful, and full of first-birthday sweetness.
Because turning one should be as sweet as strawberry shortcake.
4. Midnight Blues for a One-derful Boy
@cupidvow created a softly lit celebration that’s equal parts dreamy and dashing. With glowing neon, cascading baby blue balloons, and bold cobalt florals, this first birthday setup feels like a starry evening wrapped in love.
We love the picnic-style table with woven chargers and twinkling lights — the kind of detail that invites everyone to sit close and soak up the sweetness.
It’s stylish, soulful, and perfectly boyish in the most unexpected, modern way.
5. The Boss Turns ONE
Big balloons, bright lights, and baby in charge — @shivadecoration.in went full boardroom-to-ballroom with this epic Boss Baby-themed celebration. From the balloon arch in cool blues and chrome to the custom see-saw centerpiece, every detail is all business and all fun.
We’re loving the LED “1,” the giant cutouts, and the luxe party vibes under that shimmering chandelier. It’s dramatic, dynamic, and totally first-birthday fabulous.
Because when you’re the Boss Baby, one is never just a number — it’s a statement.
6. A Magical “One” Night Only
@shribalajievents turned the lights down and the wonder way up for this dazzling first birthday fête. With a shimmering sequin wall, chrome balloon clouds, and a glowing marquee “1,” the entire space feels like a dreamy carnival under moonlight.
The carousel graphic and grand archway add a whimsical nod to fairgrounds of the past — reimagined in icy blue with a modern twist.
It’s theatrical, twinkling, and full of birthday magic for the little star of the show.
7. To the Moon and ONE
@space.seven launched baby Juvanraj’s first orbit around the sun with a cosmic celebration that’s truly out of this world. From the glowing crescent moon to floating rockets and pastel planets, every detail is lightyears ahead in style.
Soft blue and gray balloon clusters mimic clouds and constellations, while that illuminated “1” beams like a little supernova. And can we talk about the floor design? It’s giving sky-high whimsy with a gentle sunrise glow.
A first birthday worthy of the stars — dreamy, daring, and filled with wonder.
8. Born to Be Wild
@thesimpleluxeevents delivered a jungle-chic dream for little Noah’s big ONE. With safari prints, rich greenery, and a palette of mustard, mint, and cream, this celebration roars with style and sophistication.
We’re obsessed with the faux lion nestled beneath balloon vines — a playful nod to the king of the jungle — and that illuminated “1” standing proud among the wild blooms and soft jungle hues.
It’s adventurous, elevated, and made for a little explorer stepping into his first year with courage and charm.
9. One-derfully Botanical
This darling scene by @bsk_party_shop is the perfect blend of boyish charm and garden whimsy. With eucalyptus garlands, blush florals, and a crisp white backdrop, it’s a fresh, modern take on a first birthday celebration.
The metallic blue “one” balloon adds a playful pop, while delicate treats and rosy touches make the whole setup feel like a page from a storybook picnic.
It’s light, lovely, and oh-so-lovingly curated — a beautiful beginning to year two.
10. Sweet Skies for Baby Ryan
Clouds, stars, and the cutest little floppy-eared friend — @partydecorla brought Ryan’s birthday dreams to life with this pastel-perfect setup. From the cuddly Cinnamoroll theme to golden star accents and bubbly balloon garlands, it’s a heavenly celebration from top to toe.
We’re loving the mix of textures — plushy clouds, dreamy blues, and a soft shag rug that’s just made for tiny toes and big smiles.
A starry, soft-sky day for a birthday boy who shines oh-so-bright.
11. First Lap Finish
When I saw this setup by balloonsandco.xo, I instantly thought — now this is how you do a first birthday with edge.
Maddox’s “First Lap” theme nails the balance between cool and cute. The muted race tones, checkered flags, and mini tire moment make it feel fresh and modern without losing that playful spirit.
Perfect for a little one who’s already speeding into toddlerhood.
12. Hunny Bee One
This dreambigballoonsandevents setup made my heart melt the second I saw it.
The soft beige tones paired with golden sunflowers feel like a warm afternoon in the Hundred Acre Wood. That little basket of blooms? Pure sweetness. And of course, Pooh with his “hunny” pot makes the whole scene irresistibly nostalgic.
It’s the kind of first birthday that feels like a cozy hug — sweet, sunny, and softly magical.
13. Bright & One
This instantly made me smile — it’s like sunshine bottled up into a birthday backdrop.
I love how s.hadidy.eventplanner played with bright primary colors and turned simple balloons into a little sunburst and puffy clouds. The oversized “ONE” letters really ground the setup and add that fun, photo-ready moment. It’s playful, cheerful, and just so full of light.
If I were throwing an outdoor bash for a little one, this would be my sunshine-soaked inspiration.
14. Clownin’ Around One
This andotherhappythoughts setup is a total joy riot — like stepping straight into a vintage circus dream.
I’m obsessed with how the polka-dotted cake, cotton candy color palette, and tiny Ferris wheel of cupcakes instantly transport you to a wonderful fairground. Every treat feels like a little act in its own right — playful, nostalgic, and beautifully styled. And those mini umbrella toppers? Too cute.
It’s the kind of first birthday that feels like a big, sweet laugh — one you’ll remember long after the last cupcake’s gone.
15. Wild One Safari
This balloonsbybex setup takes “wild one” to a whole new level — and honestly, I’m living for every jungle-drenched detail.
From the safari jeep to the life-size tiger lounging beside a glowing marquee “1”, it’s giving luxury expedition with a toddler twist. The balloon garland mixes lush greens with animal prints and earthy neutrals — think banana leaves, giraffe spots, and golden lion vibes.
I suggest that it is perfect for the little explorer whose first year has been one big, beautiful adventure.
16. Roarsome One
This setup is straight out of a dino dream — and I’m completely charmed.
With friendly pastel dinosaurs, a glowing marquee “1”, and soft jungle greens and blues, it feels like a prehistoric hug. The balloon clouds are like fluffy bursts of ancient mist, and that little wooden crate of wild greenery? Just enough adventure to make it feel like your own backyard Jurassic.
buba_balloons made it playful and gentle — perfect for a little one whose roar is just beginning.
17. Orbiting One
Blast off into Promise’s first year with this stellar space-themed setup by dazzlingballoonsandevents — I mean, how dreamy is this?
The metallic gold and sky-blue balloons feel like floating galaxies, while that little astronaut and rocket are pure magic. I love how the “Love you to the moon and back” arch wraps around the whole scene — it’s tender, timeless, and a little bit fanciful.
And that vintage white high chair? It’s the sweetest seat in the solar system. Perfect for a tiny explorer’s first trip around the sun.
18. Little Driver One
Dyal’s First Lap is off to a stylish start — and I’m completely obsessed with this tiny race day moment from zaza.balloons.
The color palette? Cool dusty blue, cream, and checkerboard black — it’s retro, refined, and just edgy enough. That oversized road balloon in the shape of a “1” is such a fun twist, and the tire prop adds the perfect pit stop vibe.
What really gets me, though, is how it balances playfulness with polish. It’s the kind of party setup that feels made for memories and first milestones.
19. One Gold Boy
There’s something irresistibly joyful about the mix of kelly green, sky blue, and those cheeky golden stars. The checkered backdrop gives it a modern twist, while the pot of gold adds just the right dose of sweetness.
heeventcollectivex had pure magic up their sleeves with this “One Lucky Boy” celebration — and honestly, I can’t stop smiling at the charm of it all.
It feels like a lucky little rainbow exploded in the best possible way. If you’re after a first birthday that’s bright, bold, and packed with playful energy, I suggest that this setup totally hits the jackpot.
20. Dude Turns One
daysdesigned_ served up the coolest vibes for little Sawyer’s big day — and I’m absolutely obsessed with the retro-cool energy of this “One Happy Dude” party.
Think creamy taupes, bold blacks, and cheeky checkerboard patterns, all wrapped in a groovy wave of smiley faces and peace signs. The vibe is modern meets 90s throwback — and that cake? A total showstopper.
This setup is pure attitude in the best way, and I love how it feels both playful and ultra-stylish. Perfect for the mini trendsetter in your life.
21. Cactus Party Pop
This cactus-themed bash is bursting with joy — a full-on fiesta of color, play, and charm. I love the rainbow balloons cascade like a party cloud, with cheeky cacti tucked between the pops.
I love the way “UNO” steals the spotlight — it’s clever, bright, and totally on theme. Long white tables keep things grounded with playful place settings and fun drink toppers.
Styled by floating.designs, this one’s made for little guests with big personalities.
22. Howdy One Year
This barnyard birthday setup is the sweetest kind of howdy. I love how the soft mustard, sage, and sky blue balloons keep things playful but still refined.
That little cowboy? Heart-melting. And the cow-print accents tucked into the arch? So clever. It’s rustic charm with a modern palette—and the whole scene feels like a warm breeze on a summer morning.
ballooncoevents nailed the vibe.
23. One Paw Patrol
I can’t get over how cute this Paw Patrol party setup is—it’s everything I’d want if I were throwing a themed birthday bash for a little pup fan. From the dreamy arches to the puddle-shaped mat, it feels like a mini Adventure Bay brought to life. I love how the space feels both magical and modern.
The pastel blues mixed with soft whites and hints of gold give it a sweet, stylish edge, while the character cutouts add just the right amount of fun. And those shelves of party favors? So satisfying—and practical too.
Definitely saving this clever setup from neapartydeko for future inspo.
24. Hole in One
Okay, but how perfect is this golf-themed first birthday? I’m obsessed with how thesimpleluxeevents took a classic concept and made it feel so soft and stylish. That muted color palette of sage, cream, and dusty blue? Absolute baby chic.
I also love that little golf cart cutout—so playful, but it doesn’t take away from the elegance of the setup. And the “Hole-in-One” arch? Honestly, I might steal that pun for my next party. It’s clever and cute.
If you’re dreaming up a theme that’s polished but still totally fun, this one’s a winner.
25. Dino First Bash
This dino-themed first birthday by balloonsbycaitie is the sweetest prehistoric party I’ve ever seen. The palette is soft and earthy—think misty blue, fern green, and golden champagne—and it makes everything feel so cozy and elevated.
I’m especially charmed by the “Adopt a Dino” wall—it’s playful, memorable, and perfect for little guests to take home a cuddle buddy. And those oversized cutouts? They give the setup so much personality without overwhelming the space.
If you’re after something playful with a hint of wild, I suggest, this setup is a total win.
26. Floral First Bash
If you love nature-inspired whimsy with a refined twist, this setup is a floral dream.
I can’t stop swooning over this garden-themed celebration by paperlattes. It’s like stepping into a storybook farmer’s market—soft florals, blush balloons, and that charming little cart spilling with blooms and produce.
The pastel storefronts and climbing vines feel so fresh and playful. And that “one” banner draped across the high chair? Just the kind of sweet touch I adore for keepsake photos.
27. One Jungle Ride
If you’re dreaming of a safari moment that’s playful and polished, this setup from tatti_balloon_design is such a gem. I mean, how sweet are those soft jungle tones paired with luxe gold balloons?
The whole scene feels like a mini zoo adventure—complete with the cutest lion, zebra, and giraffe cutouts. And that grassy turf base? It adds the perfect outdoorsy texture without needing an actual yard.
I must say, this one’s made for little explorers and big smiles.
28. Rookie of One
Okay, sports mamas—how perfect is this baseball-themed first birthday from imagine_it_decor? The oversized baseball backdrop and those tiny balloon bats totally knocked it out of the park.
I love that the red, navy, and cream palette keeps it classic but still super fun. It’s sporty without feeling too grown-up, which can be a tricky balance for first birthdays.
If your little rookie is already swinging for the fences, this one’s a total win.
29. One Bear Hug
Okay, I have all the heart eyes for this cuddly teddy bear bash by kshpartydecor. It’s playful, outdoorsy, and full of charm—those jumbo bears lounging on the grass? Adorable.
The earthy browns and soft blues feel so cozy, like a warm hug wrapped in balloons. I especially love the arched structure—it gives the whole setup a whimsical, storybook feel.
Perfect for your little cub’s first bear-y big adventure.
30. Silver Onederland
I mean… how magical is this icy blue dream by sara_event? From the chrome balloons to the towering marquee “1,” it feels like a snowy wonderland made just for your little one’s big day.
The mix of clear pedestals and metallic treats adds a luxe, modern twist—I couldn’t stop staring at those stacked macarons! It’s chic without trying too hard, and perfect for a winter baby or anyone loving a cool-toned palette.
I suggest to try this silver-dusted “Onederland” that feels fresh and fabulous.
31. Carnival One-der
This one had me grinning ear to ear—sassymoments_ brought the big top magic with a carnival-themed setup that’s pure childhood whimsy. The golden ticket details? Obsessed.
I love how the bold reds, baby blues, and golds play together—it’s vibrant without being chaotic. And those playful signposts? Such a fun way to guide guests (and little ones!) toward the sweets and treats.
Honestly, if you’re dreaming up a birthday bash with character and charm, this is it.
32. 1st Balloon Flight
I can’t get over how sweetcartsrentals_chicago turned this balloon flight theme into something so soft and dreamy. The pastel palette paired with gold accents feels like the perfect mix of whimsy and elegance.
Mostly, I love those floating clouds of balloons make it feel like you’re actually up in the sky. And the vintage hot air balloon cutout? Just the kind of detail that makes a party feel extra special.
If you’re into charming, storybook-style birthdays, this one totally soars.
33. Undersea First Birthday
I love how the seafoam greens, soft aquas, and creamy neutrals come together — it instantly transports you to an ocean cove on a calm morning.
The little netting details, the starfish, and that sweet smiling whale? Just perfection. It’s gentle, playful, and still totally chic — like a lullaby in party form.
If you’re dreaming of something serene and magical, this theballoonchickaz setup is pure under-the-sea bliss. Definitely bookmarking this one for a summer babe’s first splash.
34. Cat-Tastic Birthday
This whatwillitbri setup totally made me smile — it’s playful, quirky, and just so full of personality. The checkered backdrop and cartoon kitties give it that fun, bookish charm, like a page straight out of a retro picture book.
I’m obsessed with the balloon palette too — the buttery yellows, sky blues, and peachy tones are such a cheerful mix. And those little shelves of kitty-themed goodies? So cute, I can’t even.
According to me, it’s a purr-fect idea for a little one who already has a bold, curious spirit.
35. Roaring First
If you ask me, this willowtreeevents setup is jungle-chic perfection. The gold and sage green balloons feel so luxe against the wild greenery, and those life-size safari animals? Such a fun surprise for little guests.
I love how it’s styled to feel adventurous yet elegant — like your own private safari soirée. And that crisp white mesh backdrop adds just the right amount of structure to all the whimsy.
It’s totally the vibe for a little explorer’s first wild ride.
