LEGO River Steamboat
Set #21356 · 2025 · 4,090 pieces · Epic build
Set Details
- Set Number
- 21356
- Name
- River Steamboat
- Theme
- LEGO Ideas and CUUSOO
- Year
- 2025
- Pieces
- 4,090
- Complexity
- Epic
- Build Time
- 16+ hours
- Ages
- 18+
- Type
- Great for display
About LEGO River Steamboat
LEGO River Steamboat (set #21356) is a massive display piece and one of the biggest LEGO sets produced with 4,090 pieces from the LEGO Ideas and CUUSOO theme, released in 2025. The LEGO Ideas and CUUSOO line features fan-designed sets voted into production by the community. Designed primarily for older teens and adults, this set is built for display with an estimated build time of 16+ hours.
Finding Instructions
With 4,090 pieces, set #21356 comes with a thick instruction booklet — often split into multiple numbered bags and build stages. The official PDF is available free on LEGO.com, or use LegoFinder's AI to find it instantly from a photo.
River Steamboat FAQ
More LEGO Ideas and CUUSOO Sets
Also Released in 2025
Need Instructions for River Steamboat?
Upload a photo of your LEGO River Steamboat set and get the building instructions PDF in seconds.
Upload a Photo Now