Mermaid Gabby's Aquarium Adventure (11204)
Prices last checked: 5 August 2026 at 06:32
Available From
Price Analysis
Lowest Price Ever
£11.02
at Amazon UK · Jul 2026
Average Price (12mo)
£15.33
Current vs Average
-27.0%
Below average
Price Trend
Falling
Last 30 days
Best Month to Buy
August
Value Score
9.0/10
Price-per-piece vs theme avg
The lowest price we've recorded for Mermaid Gabby's Aquarium Adventure is £11.02 at Amazon UK in July 2026. The current price is 27.0% below the 12-month average of £15.33. Prices have been trending downward recently — a good time to buy. Historically, August tends to offer the best prices for this set.
Price History & Buying Verdict
- •This set is marked as retiring soon by LEGO — once production stops, prices on the secondary market typically rise significantly.
- •The current best price of £11.19 is within 5% of the all-time low we've recorded (£11.02 at Amazon UK, July 2026).
- •It's currently 27.0% below the 12-month average price of £15.33 — a notably good window.
- •Prices have trended downward over the last 30 days — there's a chance of a further dip.
- •On price-per-piece, this is one of the better-value sets in the LEGO® Gabby's Dollhouse range (value score 9.0/10 vs theme average).
- •A recent price drop of about £6.97 was recorded in the last 30 days.
We've been tracking the price of LEGO LEGO® Gabby's Dollhouse Mermaid Gabby's Aquarium Adventure (103 pieces) for 201 days, recording 54 data points across LEGO.com and major UK retailers. Over that period the price has dropped 12 times below previous levels, with the lowest price ever recorded being £11.02 at Amazon UK in July 2026.
The 12-month average sale price for set 11204 works out to £15.33 — that's 14.8% below the LEGO RRP of £17.99. The highest price we recorded across our tracked retailers was £21.44, giving a range of about £10.42 between the cheapest and most expensive observation.
Amazon UK has run the most price drops on this set in the period we've tracked, making it the retailer most worth watching for short-term deals. Historically, August has produced the lowest average prices for Mermaid Gabby's Aquarium Adventure, so if you're not in a hurry it's worth bookmarking the page closer to that window. Prices have been trending downward over the last 30 days.
Want to see how LEGO Mermaid Gabby's Aquarium Adventure (set 11204) compares against other sets? Browse the best-value LEGO sets or check the full price-history tracker.
Description
Mermaid Gabby's Aquarium Adventure (11204) is a LEGO LEGO® Gabby's Dollhouse set with 103 pieces, with an RRP of £17.99. It's currently available from £11.19 at Amazon UK — 38% below the RRP, saving you £6.80. Prices have been falling over the last 30 days. With a value score of 9.0/10, this set offers excellent value compared to other LEGO® Gabby's Dollhouse sets.
Mermaid Gabby’s Aquarium Adventure (11204) is a make-believe toy for kids aged 4 and over who are fans of sea creatures, aquarium animals and DreamWorks Animation’s Gabby’s Dollhouse: The Movie.
This LEGO® Gabby’s Dollhouse playset is packed with vibrant features and familiar characters, including a Gabby minidoll in her mermaid outfit, and MerCat and Jellyfish figures. Kids can join Gabby and her pals to explore a colourful underwater environment filled with shells, plants and sea life. There’s lots to discover, including a slide, a giant bubble that MerCat can 'float' in, and coral that moves to reveal a hidden treasure chest. The set comes with colourful pictorial instructions, a large Starter Brick and separate bags containing 1 buildable model per bag to make creative construction fast and fun for little builders.
LEGO sets for ages 4 and over are the perfect way for adults to share in the building fun with kids. Set contains 103 pieces.
Features
- Sea creature toy for kids aged 4 and over – Girls and boys who enjoy DreamWorks Animation’s Gabby’s Dollhouse can join their favourite kitty pals for undersea fun with Mermaid Gabby’s Aquarium Adventure
- Gabby’s Dollhouse: The Movie imaginative play toy – This underwater make-believe toy has a Gabby minidoll in a mermaid outfit, MerCat and Jellyfish figures plus a Starter Brick for speedy assembly
- Kids’ build-and-play toy – There’s lots to discover, including shells, plants, sea life, a slide, a giant bubble that the characters can ‘float’ in, and coral that moves to reveal a treasure chest
- LEGO® Gabby’s Dollhouse playset – Kids can recreate stories with Gabby and role-play aquarium adventures of their own
- Expand the fun – Kids can supplement this toy with set 11205 (sold separately) to create the three expansive worlds depicted in the movie
- Preschool building toy – A wide range of engaging developmental LEGO® sets for kids aged 4 and over introduces a universe of movie favourites, TV characters and everyday heroes
- Set contains 103 pieces – This versatile LEGO® playset measures over 15 cm (5.5 in.) high, 23 cm (9 in.) wide and 7 cm (2.5 in.) deep
Frequently Asked Questions about Mermaid Gabby's Aquarium Adventure
What is the best price for LEGO Mermaid Gabby's Aquarium Adventure (Set 11204)?
The best current price for LEGO Mermaid Gabby's Aquarium Adventure (Set #11204) is £11.19 at Amazon UK. This is £6.80 cheaper than the official LEGO RRP of £17.99. Price last verified on 5 August 2026.
How much can I save on LEGO Mermaid Gabby's Aquarium Adventure?
You can save £6.80 (38% off) on LEGO Mermaid Gabby's Aquarium Adventure by buying from Amazon UK instead of LEGO.com. The official RRP is £17.99, but you can get it for just £11.19. Browse more top discounts.
How many pieces are in LEGO set 11204?
LEGO Mermaid Gabby's Aquarium Adventure (Set #11204) contains 103 pieces. At the best available price of £11.19, that works out to approximately 10.9p per piece.
What age is LEGO Mermaid Gabby's Aquarium Adventure suitable for?
LEGO Mermaid Gabby's Aquarium Adventure (Set #11204) is recommended for ages 4+. This set is part of the LEGO LEGO® Gabby's Dollhouse theme. View all LEGO® Gabby's Dollhouse sets and deals.
Where can I find the building instructions for LEGO Mermaid Gabby's Aquarium Adventure?
You can download the official building instructions for LEGO Mermaid Gabby's Aquarium Adventure (Set #11204) for free from LEGO.com. Download the building instructions here. The instructions are available as a PDF and can be viewed on any device.
Where can I buy LEGO Mermaid Gabby's Aquarium Adventure in the UK?
Is LEGO Mermaid Gabby's Aquarium Adventure on sale right now?
Yes! While not on sale at LEGO.com, you can get LEGO Mermaid Gabby's Aquarium Adventure for £11.19 at Amazon UK - that's 38% below the official RRP of £17.99. Browse more best offers.
What is the lowest price ever recorded for LEGO Mermaid Gabby's Aquarium Adventure?
The lowest price we've recorded for LEGO Mermaid Gabby's Aquarium Adventure (Set #11204) is £11.02 at Amazon UK in July 2026. That's 39% off the LEGO RRP of £17.99. Track the latest movements on our LEGO price history page.
Is LEGO Mermaid Gabby's Aquarium Adventure being discontinued or retiring soon?
Yes — LEGO Mermaid Gabby's Aquarium Adventure is flagged as retiring soon by LEGO. Once production ends and remaining stock sells through, prices on the secondary market typically climb well above RRP. If this set is on your list, the safest window is now while retailers still have stock. Browse our list of retiring LEGO sets to see what else is on the way out.
Is LEGO Mermaid Gabby's Aquarium Adventure good value for money?
Comparing piece-count to price across the LEGO LEGO® Gabby's Dollhouse theme, this set scores 9.0 / 10 for value. That works out to about 10.9p per piece. That puts Mermaid Gabby's Aquarium Adventure in the top tier of LEGO® Gabby's Dollhouse sets for raw build value — you're paying noticeably less per brick than the theme average. Compare against other contenders on our best-value LEGO sets page.
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