Under-the-Sea Party Crafts & Activities For Your Ocean-Themed Party
Picture this: a living room transformed into an actual ocean, complete with wiggly jellyfish, sparkly mermaids, and a paper shark that might just make you hum a certain famous tune. That’s exactly the kind of magic this roundup brings to your under-the-sea party.
We’ve rounded up crafts and activities that are genuinely fun to make — not just fun in theory. Kids get to paint, cut, glue, weave, and create their way through the party, which means less “are we there yet?” energy and more happy, busy little hands.
From printable fish and handprint crabs to ocean sensory bottles and foam pencil toppers, there’s something here for every age and skill level. Dive in — the water’s fine!
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Under-The-Sea Party Crafts
Forget the boring party games — we're going full ocean mode! An under-the-sea party is basically an excuse to cover everything in sea creatures, bright coral colors, and enough glitter to make Ariel jealous. The best part? These crafts and activities are super easy to set up, totally fun for a crowd, and give kids something to make, play with, and proudly take home. No scuba gear required!
These little fish are so fun and make perfect decorations for an under-the-sea party. With a printable template, they come together quickly and easily.
Octopi are as cute as can be and are sure to delight kids. Use the printable template with different colors of paper to create a whole family of these little sea creatures.
This paper shark comes with a printable template, so it’s great for a crowd. Plus, it has a familiar look to it, so changing up the colors can result in a baby shark, a mommy shark, a daddy shark, and so on.
This DIY mermaid puppet works great as a party activity for kids to make their own to take home. It’s made from an empty egg carton, so it’s a good idea to start saving a few ahead of time.
This printable scuba diver is a great meld of ease and creativity. Kids can paint the watercolor ocean background, and then cut out and glue the scuba diver printable.
Planning activities for a group can be one of the trickiest parts of party prep. Printable packs like this coral reef set make it so much easier, giving kids a variety of things to do without a lot of time or setup.
Make paper plates into cute fish with this simple printable craft. Just print out a number of copies and set them with a stack of plates for a party.
Here’s another fun printable craft that gives kids a great party keepsake. The submarine template also doubles as a fun photo frame, where the child is looking out from the porthole.
For a simple party favor idea, make a batch of this mermaid slime and portion it out into little containers. It’s so shimmery and sparkly, Ariel would be mesmerized.
It’s actually super easy to make a wave sensory bottle with common household ingredients. So for anyone who has a bunch of Starbucks bottles just sitting around the house for some reason, these make amazing party favors.
Get ready for a wiggly, squiggly, and fun good time. These paper plate jellyfish are so simple to make, all the kids will want to go jellyfishing.
Under-the-sea bingo is a great party game. The printables make setup quick and easy, and since it’s picture-based, even nonreaders can join in.
Parents can practically hear the Jaws theme playing when someone opens this card. Kids can make an actual pop up shark using the printable template.
Put this activity out and have it ready for kids anytime they want to play. It’s loaded with pretty undersea objects, and the DIY sand playdough is the perfect thing to go with it.
This is a simple, fun craft that kids will love. Use the printable template to make as many as you need, then let them have fun decorating their own starfish.
Here’s a cheap, fun way to make perfect party favors for an under the sea party. Make sea life pencil toppers out of craft foam, and give each guest a pencil, topped with a fun sea creature.
Paper weaving is a perfect combination of fun, crafting, and fine motor skills. Kids will be excited to proudly show off the woven seahorse they made, with the help of the printable template.
Combine a child’s handprints together to make this adorable little crab friend. There’s also a printable template for all the extra parts.
Drawing is such a fun skill to cultivate, and ocean animals are always a popular favorite. These printable instruction sheets give step-by-step instructions on how to draw several different cute ocean friends.
Any under the sea party needs some decorations to set the mood. This coral reef is mostly made from pool noodles, but it looks just amazing.
Everything You Need For An Epic Under-The-Sea Craft Station
Before the little ones dive in, make sure your craft station is stocked with paper plates, foam sheets, buttons, and decorative mesh — the more colorful, the better! A good supply of glue sticks and printable templates will keep things moving smoothly so no one’s stuck waiting around.
These crafts and activities are perfect for birthday parties, end-of-school celebrations, or any summer gathering where you want kids walking away with something they actually made. Head over to the blog for more creative party ideas that’ll keep your little guests entertained from start to finish!
Still riding the ocean wave? Swim on over to our Mermaid Party Guides for all the sparkly, shell-covered inspo you need to throw the most magical mermaid bash ever. And if little tummies need feeding between crafts, our Beach Party Foods collection has got you totally covered — no fins required!
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