How many pieces does set 21321 have?

The set contains 864 pieces across 186 unique parts, with no minifigures included.

What does the model show?

It recreates the International Space Station, complete with posable solar panels and a positionable robotic arm.

Is this set for play or display?

Mainly for display: it is a technical model without minifigures or play features.

LEGO Ideas and CUUSOO

International Space Station

LEGO® Ideas set 21321 recreates the International Space Station as a scaled display model, originating like every Ideas set from a fan design. With 864 pieces and no minifigures at all, the focus sits squarely on the station's architecture rather than play scenes. Posable solar panels and a robotic arm add extra detail.

Set number: 21321
Year: 2020
Pieces: 864
Minifigures: 0
Theme: LEGO Ideas and CUUSOO
Different parts: 186

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 186

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (27)

These extra parts come with the set in case one gets lost.

Description

The ISS in model form

The model recreates the station's central modules along a continuous truss structure, joined by the distinctive, unfolding solar panels that power the real station. A moveable robotic arm, modelled after the real Canadarm2, can be positioned on the build and nods to the actual maintenance and docking manoeuvres carried out in orbit. Without minifigures, the set focuses entirely on faithfully recreating the station much as it actually orbits the Earth.

Building a technical display model

Unlike a themed play set, the build here prioritises technical accuracy over play features: modules, trusses and solar panels come together piece by piece into a long, slender structure that feels closer to a scale-model project than a typical LEGO® set. A display stand holds the finished model in place and lets it rotate freely, similar to how model kits in other hobbies are often displayed. Anyone who enjoys precise, intricate builds will find a fitting project here.

Colours and parts list

Light bluish grey, white, black and dark blue define the colour scheme, echoing the metallic and dark surfaces of the real station without any bright accent colours. All 186 unique parts in the set are listed with their colours on this page, useful for tracking down the long trusses, joint pieces or solar panel elements, whether for space-themed builds of your own or other technical models beyond this set. The list is also a handy source of grey and dark blue special parts.

Who it suits

The International Space Station appeals mainly to space and technology fans after a scientifically inspired display model rather than a play set. It also works well as a gift for anyone interested in spaceflight, since it comes without minifigures or playful elements. The posable robotic arm and folding solar panels add some interaction, even though the finished model is primarily meant for display. Anyone with an interest in science generally will likely find it a good talking point on a shelf.

FAQ

How many pieces does set 21321 have?: The set contains 864 pieces across 186 unique parts, with no minifigures included.
What does the model show?: It recreates the International Space Station, complete with posable solar panels and a positionable robotic arm.
Is this set for play or display?: Mainly for display: it is a technical model without minifigures or play features.