LEGO 10435 Ariel's Magical Underwater Palace is a Duplo set valued at $98 for new and sealed sets, up 23% from an original retail price of $79.99. The set retired in November 2025 with annual appreciation averaging 21.73% since. On the used market, values range from $67 to $91 based on condition. Secondary market prices for new and sealed sets typically fall between $89 and $115. Its market is holding its ground, with a thinner supply of listings weighed against a forecast that trails similar sets.

Ariel's Magical Underwater Palace Value (New/Sealed)

This chart represents the current new/sealed value of the set Ariel's Magical Underwater Palace since November 2025. Medium accuracy
LEGO 10435 Ariel's Magical Underwater Palace is a DUPLO Ariel set released in 2024, containing 116 pieces and 2 DUPLO figures. The build centers on an undersea palace with a dancefloor featuring a spinning function and a movable swing. Characters include Ariel and Fernie, along with a Sebastian crab figure. The set is inspired by the Disney Junior TV series Ariel.

Ariel's Magical Underwater Palace has climbed about 21.7% a year since retirement and is worth around $98 sealed. If the forecast is right, it keeps going, to about $124 in five years. The average used price is $82 for those in good overall condition. New and sealed listings currently range from $81 to $110. The 2 included duplo figures account for approximately 20% of the set's total value. The set was available for 17 months, from June 2024 to November 2025.

For Sale (New/Sealed)

(US) NEW SEALED LEGO 10435 Ariel's Magical Underwater Palace - Duplo Disney's Ariel 2024
BrickEconomy Choice
$63.96
(US) NEW SEALED LEGO 10435 Ariel's Magical Underwater Palace Duplo Disney Ariel 2024 $65.00
-34.0%
(US) DUPLO Disney Ariel's Magical Underwater Palace 10435 $69.99
-28.9%
(US) NEW LEGO DUPLO Disney Ariels Magical Underwater Palace 10435 Princess Mermaid $75.00
-23.8%
(US) Duplo 10435 Ariel's Magical Underwater Palace $79.99
-18.7%
(US) Duplo 10435 Ariel's Magical Underwater Palace $79.99
-18.7%
(US) Ariel's Magical Underwater Palace from BrickLink seller BrickGod $80.00
-18.7%
(CA) Disney Ariel's Magical Underwater Palace (116 Pieces) The Little Mermaid $87.30
-11.3%
(US) Amazon listing for Ariel's Magical Underwater Palace $89.99
-8.6%
(US) DUPLO: Ariel's Magical Underwater Palace (10435) RARE Retired NEW 116 Piece $92.99
-5.5%
(JP) 10435 DUPLO: Ariel's Magical Underwater Palace 2+ Block Toy New $97.13
-1.3%
(US) NEW SEALED LEGO 10435 Ariel's Magical Underwater Palace Duplo Disney Ariel 2024 $97.95
-0.5%
(US) DUPLO Disney Ariels Magical Underwater Palace 10435 New Building Set Toy $99.99
+1.6%
(GB) DUPLO Disney Ariels Magical Underwater Palace 10435 $107.26
+9.0%
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Sales Distribution (Last 90 Days)

This chart shows the distribution of sales for the past three months of new/sealed 10435 Ariel's Magical Underwater Palace.

Sale Trends

This chart shows the sales trends of new/sealed 10435 Ariel's Magical Underwater Palace.

Market Momentum

Neutral
Listings are thinning out and this set's retirement pop is running ahead of typical, but momentum is holding level for now.
DemandBottom 25% in Duplo
Very low demand
12 months agoToday
SupplyTypical for Duplo
Listings down 36% this month
12 months agoToday
Pop so far vs typical+16% typical for Duplo
+19% value pop so far
Retired12 months
Outlook:9% bearish·44% neutral·47% bullish
Why it's moving, signals and outlook

Ariel's Magical Underwater Palace Duplo figures

Ariel's Magical Underwater Palace contains 2 duplo figures. All 2 duplo figures are exclusive to this set.

Sets in Duplo / Ariel

10420 Ariel and Flounder's Cafe Stand

Theme / Subtheme Duplo / Ariel
Year 2024
Pieces / Duplo figures 22 / 2
Availability Retired
10420 LEGO Duplo Ariel and Flounder's Cafe Stand
Retail $19.99
Value $23.31
Growth  +16.6%
Annual growth 5.9%

Sets in Duplo from 2024

66788 Big Imaginations Gift Set

Theme / Subtheme Duplo / Value Packs
Year 2024
Pieces 111
Availability Retired
66788 LEGO Duplo Big Imaginations Gift Set
Retail $39.98
Value $39.95

10439 Cars and Trucks Brick Box

Theme Duplo
Year 2024
Pieces / Duplo figures 80 / 2
Availability Retired
10439 LEGO Duplo Cars and Trucks Brick Box
Retail $49.99
Value $59.06
Growth  +18.1%

10416 Caring for Animals at the Farm

Theme / Subtheme Duplo / Farm
Year 2024
Pieces / Duplo figures 74 / 2
Availability Retired
10416 LEGO Duplo Caring for Animals at the Farm
Retail $49.99
Value ~$49.99

10423 Buildable People with Big Emotions

Theme / Subtheme Duplo / Understanding Feelings
Year 2024
Pieces 71
Availability Retired
10423 LEGO Duplo Buildable People with Big Emotions
Retail $49.99
Value $52.12
Growth  +4.3%

10434 Peppa Pig Supermarket

Theme / Subtheme Duplo / Peppa Pig
Year 2024
Pieces / Duplo figures 70 / 4
Availability Retired
10434 LEGO Duplo Peppa Pig Supermarket
Retail $69.99
Value $65.00

10433 Peppa Pig Birthday House

Theme / Subtheme Duplo / Peppa Pig
Year 2024
Pieces / Duplo figures 59 / 3
Availability Retired
10433 LEGO Duplo Peppa Pig Birthday House
Retail $39.99
Value $45.43
Growth  +13.6%

10422 3in1 Space Shuttle Adventure

Theme / Subtheme Duplo / Space
Year 2024
Pieces / Duplo figures 58 / 2
Availability Retired
10422 LEGO Duplo 3in1 Space Shuttle Adventure
Retail $59.99
Value $68.90
Growth  +14.9%

10421 Alphabet Truck

Theme Duplo
Year 2024
Pieces / Duplo figures 36 / 2
Availability Retail
10421 LEGO Duplo Alphabet Truck
Retail $39.99
Available at retail

Ariel's Magical Underwater Palace Questions

How much is LEGO 10435 Ariel's Magical Underwater Palace worth today?

Sealed in its box, Ariel's Magical Underwater Palace is valued at $98, with most sales landing between $89 and $115. Used copies are worth about $82.

Has LEGO 10435 Ariel's Magical Underwater Palace been retired?

Yes. LEGO retired Ariel's Magical Underwater Palace in November 2025 after 17 months on store shelves. Sealed copies are now found only on the secondary market, so the price follows what collectors will pay.

How has LEGO 10435 Ariel's Magical Underwater Palace performed since its release?

Ariel's Magical Underwater Palace has gained 23% on its original retail price of $79.99, or roughly 21.7% a year on average. That beats the Ariel average of 8.3% a year by a clear margin.

What is the one-year forecast for LEGO 10435 Ariel's Magical Underwater Palace?

BrickEconomy's forecast puts Ariel's Magical Underwater Palace near $102 in twelve months, about 3% more than today. In the short term the market reads neutral. Demand, supply and price signals are mixed or quiet. This is an estimate and markets can change.

How many pieces and Duplo figures are in LEGO 10435 Ariel's Magical Underwater Palace?

The set contains 116 pieces, or $0.69 per piece at retail, with 2 Duplo figures: Disney Princess Ariel and Disney Princess Fernie Merman. Together the Duplo figures are worth about $20, about 20% of the set's value, and Disney Princess Fernie Merman is the most valuable at $11. None of them appears in any other set.

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Immerse fans of Disneys The Little Mermaid in a world of undersea fun with the LEGO DUPLO Disney Ariels Magical Underwater Palace (10435) building toy for preschool kids. Toddlers aged 2+ use their logical thinking and self-expression to recreate scenes from the Disney Junior TV show Ariel.

Toddlers help the Disney Princess Ariel LEGO DUPLO figure to get ready in her bedroom. She then hits the dancefloor, with Fernie and Sebastian playing musical instruments. These are just some of many accessories that inspire toddlers to invent stories about Ariel and her friends. By role-playing the characters, toddlers explore how to build relationships. This buildable educational toy also develops dexterity as toddlers spin the dancefloor and push the movable swing.

Ariels undersea buildable castle toy also helps preschool kids practice fine motor skills and hand-eye coordination as they assemble this sets building bricks in their own creative way to make a display piece theyll be...
Description provided by LEGO©