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21356 LEGO Ideas River Steamboat thumbnail image

21356 LEGO Ideas River Steamboat
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21356 LEGO Ideas River Steamboat
  • River Steamboat thumbnail
  • River Steamboat thumbnail
  • River Steamboat thumbnail
  • River Steamboat thumbnail
  • River Steamboat thumbnail
  • River Steamboat thumbnail

LEGO 21356 River Steamboat is a Ideas set currently available at retail for $329.99 and is projected to retire at the end of 2026. Current new-sealed secondary market prices range from $320 to $436.

Forecast Model

This represents the expected annual growth (CAGR) based solely on a forecast model.
LEGO 21356 River Steamboat is an Ideas set released in 2025, containing 4090 pieces. The model depicts a minifigure-scale Western river steamboat with an operational paddle wheel linked to a steam engine, a functional rudder, adjustable boarding stages, and an anchor. Interior spaces include a pilothouse, crew cabin, bathroom on the texas deck, music stage, and a restaurant on the main deck, along with a boiler deck steam engine museum featuring a working piston and a Watt steam engine. It is LEGO Ideas No. 64 and is based on the Western River Steamboat project by Aaron Hall (CTDpower).

Once retired, the expected annual growth will be close to 6% after the second year, valuing the set between $396 and $414 shortly after it is retired.
Retirement risk. River Steamboat is anticipated to retire shortly across most LEGO retail markets and regional LEGO.com platforms, with a number of regions having already done so.
All regions

For Sale (New/Sealed)

This chart shows the sales listing trends of 21356 River Steamboat.
 (LK) 18+ Ideas River Steamboat 21356 Building Set, 3601 Pieces (US STOCK) $250.79
-24.0%
(KR) Ideas 21356 River Steamboat 4090 PCS-NEW Sealed/Express $269.98
-18.2%
(US) Ideas River Steamboat [21356], NEW SEALED BOX 2826 pcs
BrickEconomy Choice
$280.00
-15.1%
(US) Ideas River Steamboat 21356, 4090 Pieces, Vehicles, 18+, New in Box $285.00
-13.6%
(US) 21356 River Steamboat - Ideas NEW & SEALED $285.00
-13.6%
(US) Ideas River Steamboat 21356 Set 4090 Pieces 18+ $295.00
-10.6%
(CA) Ideas River Steamboat 21356, 4090 Pieces, Vehicles, 18+, Box $299.99
-9.1%
(US) Ideas River Steamboat 21356, 4090 Pieces, Vehicles, 18+, Box $300.00
-9.1%
(CA) Official LEGO (21356) Ideas River Steamboat - New Sealed - $303.37
-8.1%
(KR) Ideas 21356 Mississippi River Steamboat 4,090 Pieces $304.90
-7.6%
(US) Ideas River Steamboat Building Set - Room Decor for Men and Women - Boat Model Buildi... $307.83
-6.7%
(US) LEGO Ideas 21356-1 River Steamboat $319.99
-3.0%
(US) Ideas 21356 Mississippi River Steamboat 4,090 Pieces $324.99
-1.5%
(US) NEW SEALED LEGO 21356 River Steamboat - Ideas 2025 $328.95
-0.3%
(US) (21356) Ideas River Steamboat - New Sealed - Ships Fast $329.97
0.0%
(US) Ideas River Steamboat [21356], NEW SEALED BOX 2826 pcs $329.99
(US) Offical set 21356 Ideas River Steamboat at LEGO.com $329.99
Show 23 more listings

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My Collection

River Steamboat Reviews

39 reviews
4.8
Collectors
Investors
Jays Brick Blog
“At 4,090-pieces, it also becomes the biggest LEGO Ideas set by piece count (eclipsing 21330 Home Alone), and it’s not only a gorgeous model, but has plenty of incredible functions built into it! There’s also so much going on the inside that fans of mechanical LEGO sets will... More surely appreciate the engineering that has gone into this set.”
Full review at jaysbrickblog.com
BrickEconomy Member Review
“This LEGO Ideas set brings a detailed river steamboat to life with 4,090 pieces, featuring a working paddle wheel, functional rudder, and multiple interior spaces like a music stage, restaurant, and museum. Designed for adult builders, the model offers a highly detailed build with removable decks for easy access. With its intricate design and moving parts, this set is a great display piece for history and LEGO enthusiasts alike.”
 

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
Honor the meticulous craftsmanship involved in building a classic river steamboat with this LEGO Ideas model kit for adults (21356). This minifigure-scale display model captures the authentic details of a steamboat that has been refurbished for entertainment tours, and makes wonderful nautical decor for the home or office.

Move the boat on a surface to activate the paddle connected to the steam engine, turn the ships wheel in the pilothouse (or the knob outside) to activate the rudder, raise/rotate the boarding stages and drop the anchor. Explore the pilothouse, crew cabin and bathroom on the texas deck; the music stage and restaurant on the main deck; and the boiler deck, which features a kitchen and a steam engine museum that showcases a LEGO working piston, Watt steam engine and more.

Find step-by-step building instructions in the box or on the LEGO Builder app. This collectible set makes a super gift idea for men, women and any boat travel enthusiasts or history-lovers....
Description provided by LEGO©