Under The Sea Decor
Turn your kid's big day into an aquatic adventure with under the sea-themed decor and party supplies, from sea creature balloons to fishy cupcake kits and more.

Under the sea birthday party decorations from Paperless Post Party Shop are bubbling with ocean-inspired designs to make your kid’s birthday an event to remember. Effortlessly style your party room by conveniently grabbing all the necessary goods in one place. Our shelves are stocked with everything from the essentials to unique accents. 

Create your very own Atlantis with under the sea party decorations like shark-shaped foil balloons and blue balloon garlands & streamers. Dive in deeper with iridescent tinsel garlands and customizable letter banners that say whatever your little fishy desires. 

Make waves when presenting the cake, thanks to whimsical embellishments like glittery cake toppers and candles—or use a cupcake kit and offer several different flavors. Have plates ready to go by the treat station—we have plenty of charming designs, like sea turtles, shells, mermaid patterns, and more! Cups with pirate ship flags and napkins shaped like seahorses, lobsters, and octopi add playful appeal. As the party comes to a close, reel in the kids and send them home with their own catch of the day—party favors stashed in on-theme treat boxes. 

Our under the sea party kit is an excellent choice if you want to fully customize your supplies. It provides decorations and tableware for up to eight guests, giving you a stress-free planning experience you won’t second guess.