Established 2015
Once Upon an Island
118 Agate Ave, Balboa Island CA 92662See the birthday party venue →
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Explore Once Upon an Island
Find your magic
Every world has its own address, its own cast, and its own kind of magic, here’s where each story lives, and how to find your way in.
Established 2015
See the birthday party venue →
Follow us · @once_upon_an_island
Find us · open in Maps
Explore Once Upon an Island
Established 2020
Follow us · @once_upon_an_island
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Enter Once Upon a Christmas
Established 2025
Follow us · @mermaid_cove_funzone
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Visit Mermaid Cove
Which world is right for you?
They’re two different kinds of magic. Once Upon an Island (118 Agate Ave, Balboa Island) is our flagship fantasy world, home to full Mermaid Transformationsprincess experiencesluxury birthday parties and ticketed public events, with experiences that run about an hour. Mermaid Cove (600 E Bay Ave, inside the Balboa Fun Zone) is our express location, walk-up mermaid transformations from $29.99 with braids, shimmer makeup and tail photos in about 20 minutes. Think of the Cove as the perfect first taste, and the Island as the full fairytale.
Birthday parties, private celebrations and hosted events all live at our flagship, Once Upon an Island on Balboa Island, see all our party collections here. Mermaid Cove is a walk-up experience and doesn’t host private parties, though it’s a wonderful add-on stop during a Fun Zone day.
At Mermaid Covewalk-ups are welcome whenever the Cove is open, it’s built for spontaneous magic during a day at the Balboa Fun Zone. At Once Upon an Islandexperiences are booked in advance so your cast and world are ready for you.
Once Upon a Christmas is our seasonal holiday world at 114 Agate Ave on Balboa Island, right beside the flagship, with its own cast, story and limited-release tickets each holiday season.