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How to Throw a Fun and Creative Sea-Themed Birthday Party: Planning a sea-themed birthday party is an excellent way to celebrate summer and create lasting memories.

Whether you’re looking for DIY decorations, fun crafts, or a simple birthday cake recipe, this guide has you covered. Here’s how to throw a fantastic sea-themed birthday party with minimal effort and maximum fun.

DIY Treasure Boxes from Egg Cartons


Creating treasure boxes from egg cartons is a simple and cost-effective way to add a touch of adventure to your sea-themed birthday party.

Materials Needed:


– Empty egg cartons
– Paint (gold, brown, or any preferred color)
– Glitter, beads, and other decorative items
– Glue and scissors

Instructions


1. Prepare the Cartons: Cut the egg cartons to the desired size for your treasure boxes.
2. Paint: Apply paint and let it dry completely.
3. Decorate: Use glitter, beads, and other items to decorate your treasure boxes. Make them sparkle like real treasure chests!
4. Fill: Add small treats or toys inside the boxes to delight your young party guests.

Crafting Cute Small Whales


Small whale crafts add a charming touch to your party décor. Here’s a quick guide to making them.

Materials Needed:


– Egg cartons
– Paint
– Cardboard scraps
– Glue and scissors

Instructions


1. Create the Bodies: Cut the egg cartons to form the whale bodies.
2. Paint: Paint the whale bodies and allow them to dry.
3. Add Fins and Tails: Cut fins and tails from cardboard scraps and attach them to the bodies with glue.
4. Details: Add eyes and smiles to bring your whales to life.

Diy cardboard whale

Making Catalejos (Spyglasses)


Spyglasses are a fun, interactive craft that fits perfectly with the sea theme.

Materials needed


– Cardboard tubes (from paper towels or toilet paper)
– Paint or colored paper
– Stickers and decorations
– Glue and scissors

Instructions


1. Prepare the Tubes: Paint the cardboard tubes or wrap them in colored paper.
2. Decorate: Use stickers and other decorations to personalize each spyglass.
3. Play: Let the kids use their homemade spyglasses to explore and search for treasure.

Simple Sea-Themed Birthday Cake


A delicious yogurt cake decorated with fresh fruits is the perfect addition to your sea-themed birthday party.

Ingredients


– 1 cup plain yogurt
– 1 cup sugar
– 1 cup flour
– 1/2 cup vegetable oil
– 2 eggs
– 1 tsp baking powder
– Fresh fruits for decoration (strawberries, blueberries, kiwi, etc.)

Instructions


1. Mix Ingredients: Combine yogurt, sugar, and eggs in a bowl. Mix until smooth.
2. Add Dry Ingredients: Add flour and baking powder, then mix well.
3. Add Oil: Stir in the vegetable oil until fully combined.
4. Bake: Pour the batter into a greased round cake pan and bake at 350°F (175°C) for 30-35 minutes. Check with a toothpick to ensure it’s done.
5. Decorate: Let the cake cool, then decorate with fresh fruits to resemble a cute little fish (we added a cardboard tail).

Easy handmade decor

The final touches for our birthday table were pretty easy, crabs made from croissants, a customized garland that I created on Canva, shark teeth (cheese), algae made from fruits and sticks, sea/ocean related Playmobils that we already own or shells. I don’t have much time at the moment so these were actually enough and were a win!

Paper boats were a must too of course! Here’s a video if you want to take a look

Jellyfish piñata!

If you know us you know that we love to create piñatas from paper lamps, it’s reusable and so easy to make! Here I just added some colored paper and it was perfect!

Upcycling jelly fish piñata

Imagination Over Complexity

The key to a successful sea-themed birthday party lies in creativity and simplicity. With just a few basic materials and a bit of imagination, you can create an engaging and delightful party atmosphere. Kids will love exploring, crafting, and celebrating, making it a birthday to remember.



Throwing a sea-themed birthday party is all about having fun and making memories. With these tips and ideas, you’re well on your way to hosting a party that’s sure to be a splash! Happy birthday planning!

Scraps & Coffee Grounds

Scraps & Coffee Grounds

Hi! my name is Sara and I am a DIY lover!
This blog started as a journal where I wrote my favorite recipes, from cosmetics and food. Then I started to create and upcycle clothes and I finally needed crafts ideas and easy kids activities for our homeschool journey. We love handmade stuff and easy projects and I share them all here!

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