"One Year Later" SpongeBob First Birthday Party

Check out this unique, unisex SpongeBob first birthday party with fun decor, backdrop ideas, food, and favors!

Need a unique first birthday party idea for a boy or girl?

Check out this adorable and creative “One Year Later . . .” SpongeBob-themed first birthday party!

It’s the perfect way to bring plenty of color, laughter, and underwater adventure to your first birthday celebration!

From bright decorations inspired by Bikini Bottom to creative food, favors, and cake ideas, this theme is sure to delight guests of all ages.

Whether you’re a longtime fan or your little one lights up at the sight of SpongeBob, get ready to dive into all the details that will make this first birthday party extra special.

Special thanks to Nikedra Sanks with Royal Reign’s Party Planning for sharing this cute party with us!

Cute Sponge Bob First Birthday Party Ideas

Party Decor

SpongeBob party backdrop that says "One Year Later . . . " with pink, blue, and yellow balloons, a number 1 marquee letter, and Patrick Star cutout.

Scene from a "One Year Later" SpongeBob-themed first birthday party, including a backdrop with a Pineapple house, balloon arch, and party tables.

This gender-neutral first birthday party theme lends itself to bright, cheerful colors that are perfect for a boy or girl.

We love the ocean-inspired decor like the paper lantern jellyfish, sea water green streamers, and ocean tide fabric table runners.

The spot-on backdrops are straight out of Bikini Bottom.

And, the lit marquee letters add #1 add a personal touch.

You’ll also find sprinkles of inexpensive decor items like a colorful balloon arch, party leis, and paper dinnerware that pull the whole theme together.

Party Decor: Royal Reign’s Party Planning
Marquee Letters: Handa Events
Backdrop Decal: Bianca Lynn
Event Center: R&R Event & Entertainment Center

Lit up marquee letters that spell the name "REIGN" at a birthday party.

Party Food

Crabby Pattie SpongeBob cupcakes on a party table with popcorn and sodas.

Pineapple rice Krispies treats and cookies with blue icing drizzled over top.

How cute are these SpongeBob birthday party treats?!?

We love the creativity that went into creating these theme-appropriate food ideas, including chocolate-covered strawberries and pretzel rods, Krabby Patty cake and cupcakes, and pineapple rice krispies treats.

Treats: Chrissy Faith