1. Sets
  2. Ideas
21366 LEGO Ideas Floating Sea Otters thumbnail image

21366 LEGO Ideas Floating Sea Otters
Images 6Description 
21366 LEGO Ideas Floating Sea Otters
  • Floating Sea Otters thumbnail
  • Floating Sea Otters thumbnail
  • Floating Sea Otters thumbnail
  • Floating Sea Otters thumbnail
  • Floating Sea Otters thumbnail
  • Floating Sea Otters thumbnail

LEGO 21366 Floating Sea Otters is a Ideas set currently available at retail for $119.99 and is projected to retire in early to mid 2028. Current new-sealed secondary market prices range from $110 to $133, with the average below MSRP at $112.

Forecast Model

This represents the expected annual growth (CAGR) based solely on a forecast model.
LEGO 21366 Floating Sea Otters is an Ideas set released in 2026, containing 1234 pieces. It builds a brick-built mother sea otter floating on water with a pup resting on her belly, plus a buildable clam accessory. The model is arranged across four modules and includes poseable elements such as the mother otter’s head, mouth, flippers, and claws. The clam can be placed in the mother’s grasp.

Once retired, the expected annual growth will be close to 6% after the second year, valuing the set between $144 and $151 shortly after it is retired.
All regions

For Sale (New/Sealed)

This chart shows the sales listing trends of 21366 Floating Sea Otters.
 (US) LEGO Ideas Floating Sea Otters 21366 Building Set / BRAND NEW SEALED
BrickEconomy Choice
$90.00
(US) Ideas: Floating Sea Otters (Set 21366) Building Set - New in Box $93.99
-21.7%
(US) Ideas Floating Sea Otters Building Sets (1234 Pieces)- 21366 - NEW SEALD $94.99
-20.8%
(US) LEGO Ideas Floating Sea Otters 21366 Building Set $95.51
-20.4%
(US) Ideas Floating Sea Otters 21366 Building Kit (1234 Pieces) $97.99
-18.3%
(US) (21366) - Ideas #074 Floating Sea Otters - 1,234 Pc Set $98.99
-17.5%
(LK) Ideas Floating Sea Otters 21366 Building Set $99.99
-16.7%
(US) LEGO Ideas Floating Sea Otters 21366 Building Set. 1234 PIECES. FAST FREE SHIP $104.99
-12.5%
(US) New Sealed LEGO Ideas Floating Sea Otters 21366 Building Set 1234 Pieces $105.00
-12.5%
(US) Ideas Floating Sea Otters Building Sets (1234 Pieces)- 21366 - NEW SEALD $105.00
-12.5%
(CA) LEGO Ideas Floating Sea Otters Building Set 21366 $105.51
-12.1%
(US) Ideas Floating Sea Otter 21366 18+ 1234 Pcs Building Set New Sealed $109.94
-8.4%
(US) Ideas Floating Sea Otters 21366 Building Set 1234 Pieces NEW SEALED $109.95
-8.4%
(US) 21366 Ideas Floating Sea Otters $109.95
-8.4%
(US) Ideas Floating Sea Otters Building Set 21366 - Ideas #074 NEW SEALED $109.95
-8.4%
(US) - Ideas Floating Sea Otter - 21366 - Ages 18+ - 1,234 Pcs. - New Sealed $109.99
-8.3%
(KW) Ideas Floating Sea Otters Building Sets for Adults - Room or Office Decor f $109.99
-8.3%
(US) 21366 Ideas Floating Sea Otters Building Sets for Adults 1234 pcs $109.99
-8.3%
(CA) - Ideas - Floating Sea Otters [21366] $110.78
-7.7%
(US) #21366 Ideas Floating Sea Otters New Sealed FREE Shipping Lower 48 States $112.00
-6.7%
(US) Ideas Floating Sea Otters 2 floating sea otters with this LEGO Ideas craft $114.99
-4.2%
Show 32 more listings

Sets in Ideas

21376 Orange Cat

Theme Ideas
Year 2026
Pieces 1,755
Availability Retail
21376 LEGO Ideas Orange Cat
Retail $99.99
Available at retail

21372 La Catrina

Theme Ideas
Year 2026
Pieces 1,212
Availability Retail
21372 LEGO Ideas La Catrina
Retail $139.99
Available at retail

21365 Love Birds

Theme Ideas
Year 2026
Pieces 750
Availability Retail
21365 LEGO Ideas Love Birds
Retail $49.99
Available at retail

My Collection

Floating Sea Otters Reviews

16 reviews
4.7
Collectors
Investors
Brickset
“Place the little pup figure on its mum’s belly. Pose mum’s head, mouth, flippers and claws, or change up your sea animal showpiece by giving mum the buildable clam. The original design for this set was created by a fan designer and voted for by LEGO fans. It offers a joyful,... More immersive activity for adults, whether you’re new to LEGO sets or a more experienced builder.”
Full review at brickset.com
Brick Fanatics
“21366 Floating Sea Otters goes big on realism, moving away from the more cartoonish style of Maximilian Lambrecht’s original design in the newly revealed LEGO Ideas model. That includes referencing elements of the animal’s behavior, with the addition of an otter pup lying on... More its mother’s belly, just like it would in the wild.”
Full review at www.brickfanatics.com

About Ideas

The LEGO Ideas theme, which started in 2008 as an offshoot of the Japanese website Cuusoo, then known as LEGO Cuusoo, is based around a website which allows users to submit ideas for LEGO products to be turned into potential sets available commercially. If fellow users in the LEGO Ideas community upvote the project to 10,000 then LEGO Group has a committee which votes on whether to build the set and release it.
Read more
Max out the cuteness of your home decor with the LEGO Ideas Floating Sea Otters craft kit (21366) for adults. Create an adorable brick-built model of a mother sea otter relaxing in water with her pup. Place the little pup figure on its mamas belly. Pose mamas head, mouth, flippers and claws. And change up your sea animals showpiece by giving mama the buildable clam.
The original design for this set was created by a fan designer and voted for by LEGO fans. It offers a joyful, immersive activity for adults, whether youre new to LEGO sets or a more experienced builder. And you can enjoy enhanced building with the LEGO Builder app, zooming and rotating using 3D instructions, while saving and tracking your progress.
A fun gift for animal lovers, this set contains 1,234 pieces.

FUN HOME DECOR Take time out to capture the cuteness, calm and mutual love of 2 floating sea otters with this LEGO Ideas craft kit (21366) for adults

2 SEA ANIMALS Build a detailed LEGO model of a mother...
Description provided by LEGO©