![](https://www.100layercake.com/wp-content/uploads/2024/08/dimond-8981.jpg)
![Under the sea themed birthday cake](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215006.jpg)
Morning, all! Did you catch yesterday’s pastel rainbow birthday for twins? Always fun to see a super over-the-top birthday bash. But today we’re taking a look at some party ideas you could pull off right at home, like mama Kristen Dimond did for her daughter Piper’s 4th. She went with an under the sea theme and decked the whole place out with mermaids, shells, and lots of sparkle. Thanks to Alison Bernier for sending this our way!
![Under the sea themed birthday cake](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215002.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215008.jpg)
Love all the little embellishments on the cake Jen Tee Bakes designed.
![Under the sea themed desserts](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215007.jpg)
![Under the sea themed sugar cookies](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/214995.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/214994.jpg)
How cute is this sweets spread? On-theme sugar cookies as a major kids party must around here.
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215009.jpg)
![Under the sea themed birthday invitation](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215019.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/214999.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/214996.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215001.jpg)
Kudos to Kristen on the most fun nautical details displayed throughout!
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215017.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215018.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/214993.jpg)
BTW, if you throw a party like this yourself, you can snag these candy mermaid tail stir sticks from To Be Devoured via Etsy.
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215005.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215012.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215014.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215016.jpg)
Glitter mermaid tails, obvs!
![Under the sea themed balloon decor](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215010.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215011.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215013.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215022.jpg)
SoCal’s Party Princess Productions made all the littles’ days.
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215023.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215024.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215026.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215029.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215027.jpg)
![Under the sea themed girls party](https://100lclive.s3.amazonaws.com/img/ideas/blog-full/215025.jpg)
Happy birthday, Piper!
See another cute party Kristen designed in this same home, here. And, for another take on “under the sea”, scroll through this party.
Photographer: Alison Bernier / Planner: Kristen Dimond / Signage & Calligraphy: Calligraphy Nerd / Balloon Installation: The Pop Shop / Cake: Jen Tee Bakes / Cake Topper: The Duo Studio / Candy Mermaid Tail Stir Sticks: To Be Devoured / Candy Seahorses: Cheri’s Sweets / Ariel & Ursula: Party Princess Productions / sequin linens: La Tavola