Coming in at 103 pieces, the Mermaid Gabby's Aquarium Adventure (11204) is a bite-sized build from the Gabby's Dollhouse lineup. It debuted in 2025 at $22.99. It comes packed with 3 minifigs — always a nice bonus for collectors.
The $0.223 per piece price point is on the premium side, though the build quality matches.
The Mermaid Gabby's Aquarium Adventure is a solid entry in the Gabby's Dollhouse range — nothing flashy, but well-built and fun.
Key Features
103 pieces — Compact and purpose-built — great for a quick session
3 minifigures — Adds play value and aftermarket appeal
$0.223 per piece — Standard value for the Gabby's Dollhouse range
The Movie collection — Sought-after corner of the Gabby's Dollhouse lineup
2025 release — Part of LEGO's modern era with strong design standards
Investment Analysis
With the Mermaid Gabby's Aquarium Adventure (11204) retiring this year, the investment window is wide open. History shows us that Gabby's Dollhouse sets tend to see a price bump once they're no longer available at retail. Now's the time to grab one if you haven't already.
The outlook here? Modest but worth tracking.
At $22.99 retail, the Mermaid Gabby's Aquarium Adventure is worth grabbing before it disappears. The Gabby's Dollhouse aftermarket has been kind to sets like this.
Theme Background
LEGO's Gabby's Dollhouse theme is a theme with its own loyal following, and the Mermaid Gabby's Aquarium Adventure is a 2025 release that lands in a great entry point into the Gabby's Dollhouse theme at $22.99. At $0.223 per piece, you're paying a premium — though that's typical for Gabby's Dollhouse sets in this range.
Within Gabby's Dollhouse, the The Movie sets have carved out their own niche. If you're tracking Gabby's Dollhouse for investment or just collecting, the The Movie releases are usually among the more interesting ones to watch.
Why This Set Is Special
Part-out value 2.1x retail. The individual parts are worth $48.44 on BrickLink — 2.1x the $22.99 retail price. Exceptional part-out value.
Retiring within 6 months — Set to retire July 2026. The window to buy at or below retail is closing.
Frequently Asked Questions
[{"q": "How many pieces are in the LEGO Mermaid Gabby's Aquarium Adventure (11204)?", "a": "The LEGO Mermaid Gabby's Aquarium Adventure (11204) contains 103 pieces, making it a smaller set."}, {"q": "What minifigures come with the LEGO Mermaid Gabby's Aquarium Adventure (11204)?", "a": "The LEGO Mermaid Gabby's Aquarium Adventure (11204) includes 3 minifigures. Minifigures are a key value driver for LEGO sets \u2014 exclusive or rare minifigures can appreciate significantly in value on their own, sometimes commanding high prices on the secondary market."}, {"q": "How much does the LEGO Mermaid Gabby's Aquarium Adventure (11204) cost?", "a": "The retail price (MSRP) for the LEGO Mermaid Gabby's Aquarium Adventure (11204) is $22.99 in the United States. Regional pricing is \u00a317.99 in the UK, CA$24.99 in Canada, \u20ac19.99 in Europe. This works out to $0.22 per piece. While you get fewer pieces per dollar than some other Gabby's Dollhouse sets, the build quality and specialized elements justify the premium."}, {"q": "Is the LEGO Mermaid Gabby's Aquarium Adventure (11204) a good investment?", "a": "The LEGO Mermaid Gabby's Aquarium Adventure (11204) shows moderate investment potential based on several factors. Gabby's Dollhouse sets have historically been among the best-performing themes for post-retirement appreciation. As with any LEGO investment, buying at or below retail price maximizes potential returns. Use the BrickBucks price tracker to find the best entry point."}, {"q": "What age is the LEGO Mermaid Gabby's Aquarium Adventure (11204) suitable for?", "a": "The LEGO Mermaid Gabby's Aquarium Adventure (11204) is recommended for ages 4+. The build is designed to be approachable for younger builders while still providing an enjoyable experience."}, {"q": "How big is the LEGO Mermaid Gabby's Aquarium Adventure (11204)?", "a": "The LEGO Mermaid Gabby's Aquarium Adventure (11204) measures approximately 26.20cm \u00d7 14.10cm \u00d7 6.10cm (W\u00d7H\u00d7D). It makes for a great display piece that won't take up too much shelf space."}, {"q": "When will the LEGO Mermaid Gabby's Aquarium Adventure (11204) retire?", "a": "The LEGO Mermaid Gabby's Aquarium Adventure (11204) is projected to retire around July 2026. Once a LEGO set retires, it is no longer produced or sold at retail. This typically causes prices to rise on the secondary market as supply decreases while collector demand remains. Check the retirement countdown on this page for the latest status."}, {"q": "Where can I buy the LEGO Mermaid Gabby's Aquarium Adventure (11204)?", "a": "The LEGO Mermaid Gabby's Aquarium Adventure (11204) is available from major retailers including Amazon, Walmart, Target, and LEGO.com. Use the BrickBucks deal tracker to find current discounts and the best price available right now."}]
