20 Stunning Under-The-Sea Decorating Ideas Kids Would Love
Sometimes, a kid’s room decor needs to change according to the season, such as when summer is approaching, and the “under the sea” theme would be perfect for your home. Whether your kid loves sea creatures or is a mermaid fan, there is an under-the-sea decorating idea for every kiddo that they would want to bring to their room. Have a look at diy under the sea decorations below that we have gathered for you. You can pick up some of these awesome ideas from the world under the water to decorate your kid’s room or make an amazing themed party. You don’t need to be a pro to create an underwater paradise – just choose sea-inspired colors like blue and green, and add some texture with shells, sand, or driftwood. For an extra special touch, you can use balloons to make cute sea creatures like jellyfish and octopuses. Whether you decide to go all out with an under-the-sea makeover or simply add a few aquatic touches, your kid is sure to love their new themed room. So, are you ready to dive in and explore all the possibilities?
#1. Kid’s reading corner looks like it’s “under the sea”.
This cozy little reading nook feels like stepping into a jellyfish cave — blue and green streamers hanging down like tentacles, soft pillows scattered around, and that inviting, underwater glow kids can’t resist.
Looks like someone just used a mosquito net, added a few felt sea creatures, and tossed in bean bags for the full ocean vibe.
Source: teachinghappilyeverafter.blogspot.com
#2. Tablecloths and paper cut-out turtles made this stunning ceiling decoration.
Look up — even the hallway ceiling’s turned into a sea! Blue fabric drapes overhead with turtle silhouettes gliding by. Suddenly, that boring walk to class becomes an adventure.
All it takes is some paper cutouts, a bit of string, and a good imagination.
For more details at ====> charmingclassroom.blogspot.com
#3. These coral reefs made out of egg cartons will look far more realistic when you add a little bit of paint to them.
Who knew egg cartons could turn into coral reefs? Stack and paint them gray, poke in tiny toy fish, maybe a seahorse or a bright green octopus for fun.
#4. Cut strips of blue crepe paper to simulate the ocean and add seaweed garlands and fish.
Someone turned the window into an aquarium! Blue streamers for water, green paper for kelp, and colorful fish cutouts “floating” midair. The sunlight filters through it, making everything shimmer like the sea.
In another corner, green paper fringe sets the stage for a pirate treasure scene — a black ship silhouette, shiny foil coins, and a small chest filled with trinkets. A bit of netting at the bottom pulls it all together.
For more details at ====> charmingclassroom.blogspot.com
#5. A creative way to get under-the-sea-themed utensils.
Even the utensils got the ocean memo — wrapped in blue napkins, tied with twine, and topped with little white “buoy” candies. Drop them in a green bucket, and suddenly the table’s ready for a mermaid feast. Simple, clever, and very on theme.
For more details at ====> blog.chickabug.com
#6. Paper streamer seaweed is something that will add some punch to under-the-sea-themed home decor or a party. Balloon bubbles are also amazing!
Green crepe paper twisted around the pillars looks just like seaweed swaying underwater. It frames the room perfectly, especially when you tape the strips at different heights and fringe the ends for that soft, wavy look.
Source: catchmyparty.com
#7. Make these cute paper lantern jellyfish.
Those hanging jellyfish? Just paper lanterns with yarn tentacles and pearl beads dangling down. Add a few blue fish stickers on the teal wall and a bean bag below, and you’ve got the perfect story corner. Easy to make, and way too cute.
How to make them ====> mom.me
#8 Jellyfish made from bowls, fishing line, and shower loofa.
#9 These fantastic foam balls and foam ball jellyfish are ideal for creating an underwater backdrop.
Outside, pastel jellyfish mobiles dance in the wind. Styrofoam balls painted soft colors with crepe tentacles and bubble beads catch the light just right. Hang them over bushes or a deck for a garden party that feels pure magic.
Tutorial: liagriffith.com
#10 Balloons can be used to make fun little octopuses that add an interesting touch to a room decorated in an underwater theme.
The doorway guards? Balloon octopuses with googly eyes and curly legs in bright ocean colors. They’re goofy, friendly, and impossible not to smile at. All made from regular party balloons — no fuss, all fun.
#11 Another beautiful pool noodle coral for under the sea party.
#12. Create bubble balloon strands for underwater theme decor.
Farther down the hall, blue and white balloons float up like happy bubbles. Kids can’t help giggling as they pass through, pretending to swim. Just helium, clear string, and a good eye for height.
Even the kitchen joined in — clear balloons drifting down like air bubbles, with a little paper lantern fish keeping watch above.
#13. Use some curly pool noodles, foam flowers, and plastic tablecloths to make this cute coral reef.
Pool noodles never looked better. Twisted and taped together into a rainbow coral bush, with a tiny seahorse hiding inside. Stick them in a pot of rocks, and you’ve got instant undersea magic.
How to cut curly pool noodles ====> busykidshappymom.org
#14. Transform the backyard pool into a scene from under the sea.
At night, glowing balls drift across the pool, mixing with pink floaties and a giant shell raft. Feels like jellyfish have come to dance under the stars. Just pop in some LED lights and let them float.
Source: instagram.com
#15. Use spray foam to create these stunning coral reefs.
Even spray foam gets a turn — squiggly coral branches on sticks, painted in pinks and reds once they dry. They look so wild and real it’s hard to believe they came from a can. Messy? Sure. Worth it? Absolutely.
How to make it ====> pinterest.com
#16. Go for a door decoration inspired by jellyfish.
That big purple jellyfish above the door is the perfect welcome — wobbly legs, googly eyes, and a soft tickle as you walk through. A quick craft from paper plates and crepe paper that makes everyone grin.
#17. Paint an under-the-sea-themed mural on the walls and ceiling.
Walls painted in ocean blue, with Flounder swimming by and a tiny boat floating above — even the mirror’s edged in shells. It’s pure mermaid dreamland, perfect for any little Ariel fan.
#18. Make this easy under-the-sea backdrop using plastic tablecloths.
The snack table looks like it’s wearing a net skirt, with ribbons waving like underwater grass. Behind it, layers of blue fabric ripple like waves. A few dollar-store nets and clips do the trick.
For more details at ====> meaningfulmama.com
#19. Bring the feel of “under the sea” to your party at home by using blue cellophane to cover windows and adding underwater creatures.
And the window? Wrapped in blue film with paper fish “swimming” inside. On the door, a turtle guards the seaweed scene. When the sun hits, everything shimmers and moves — almost alive.
For more details at ====> confessionsofacontrolfreak.blogspot.com
#20. Turn the entrance into a tunnel in the form of “under the sea”.
