Lego International Space Station 21321 [Set Review] - Build Your Way to the Final Frontier

Blast off into a building adventure that's out-of-this-world! Did you know the International Space Station, or ISS for short, zooms around Earth at a mind-boggling 17,500 miles per hour? It's basically a giant science lab in the sky, where astronauts conduct experiments and unlock the mysteries of space travel.

Ever wished you could be a part of the action? Well, buckle up! The LEGO Ideas 21321 set lets you build your very own mini ISS, bringing the excitement of space exploration right to your living room. Get ready to construct a mini masterpiece and become a certified LEGO astronaut!

Set Details

The LEGO Ideas 21321 box looks like it's prepped for a mission itself, boasting a sleek design that features the real International Space Station in all its glory. Inside, you'll find a treasure trove for aspiring space captains: numbered bags for smooth building, clear instructions that walk you through each step, and a whopping 864 pieces to bring your space station dream to life.

This set is geared towards builders 16 and up, offering a rewarding challenge for space enthusiasts of all ages. But the real fun is in the intricate details!

The completed model boasts posable solar panels that you can adjust to different angles, just like the real ISS does to capture the most sunlight. It also features a Canadarm2 robotic arm, which can be used to grapple satellites and other spacecraft in orbit.

Docking and resupply missions become a breeze with the included mini NASA space shuttle, and to top it all off, you get two adorable astronaut minifigures to crew your mini space station. Time to set up your very own space experiments and launch into a world of creative space adventures!

Building the LEGO Ideas International Space Station

The LEGO® Ideas International Space Station (21321) isn't just a box of bricks – it's a passport to a thrilling adventure in miniature space exploration. The building process itself is an immersive experience, filled with challenges, triumphs, and a growing sense of accomplishment as your mini space station takes shape.

The adventure begins with the foundation – the central truss structure. Take your time here, meticulously sorting the pieces and following the clear, step-by-step instructions. Utilize the numbered bags to stay organized and avoid a frantic search for specific bricks later.

Now comes the exciting part – constructing the diverse modules that make up the iconic ISS! Each module boasts its own unique design and purpose. Carefully observe the intricate details and clever building techniques used to capture the essence of the real space station. Focus on assembling one module at a time to avoid confusion. If a step seems tricky, don't hesitate to take a break and return with fresh eyes.

The final stages involve constructing the crown jewels of your space station – the solar panels and the Canadarm2 robotic arm. The solar panels, marvels of engineering in miniature, are designed to adjust their position for optimal sunlight capture. The Canadarm2, with its posable joints, adds another layer of realism and allows for imaginative spacefaring scenarios. These sections require a bit more focus and dexterity. Take your time and savor the process of bringing these crucial elements to life.

Is LEGO International Space Station Worth It

Building the LEGO International Space Station 21321 is an immersive experience that's both fun and rewarding. It's a chance to disconnect from the everyday and embark on a challenging but ultimately satisfying journey of creation.

With each completed stage, the sense of accomplishment grows, culminating in a magnificent display piece that celebrates human ingenuity and the wonders of space exploration. It's a perfect project for LEGO® enthusiasts and space aficionados alike, offering a captivating challenge and a gateway to endless hours of creative play. So, grab your metaphorical spacesuit and embark on your own building odyssey!

Complete Model

Once you've snapped brick pieces together, you'll be rewarded with a magnificent display piece that measures approximately 8 inches high, 20 inches long, and 13 inches wide. This impressive model is sure to be a conversation starter, captivating anyone who sets eyes on it. But the fun doesn't stop there!

The posable solar panels and Canadarm2 robotic arm allow for interactive play, letting you recreate iconic space missions and imagine endless space adventures. The included astronaut minifigures add another layer of fun, letting you roleplay exciting space scenarios and letting your imagination take flight!

Lego ISS Additional Information

The LEGO International Space Station (21321) might be a mini marvel, but the real ISS is a true scientific marvel orbiting Earth. Construction began in 1998 through a collaborative effort by multiple space agencies, making it a symbol of international cooperation in space exploration.

This giant orbiting laboratory serves as a platform for conducting groundbreaking research in fields like biology, physics, and astronomy, helping us understand the effects of microgravity on the human body and paving the way for future long-duration space missions.

Did you know the ISS travels at an incredible speed of 17,500 miles per hour, orbiting Earth roughly 16 times a day? That's like zipping around the world at breakneck speed while conducting cutting-edge science experiments!

Speaking of cool space stuff, did you know the LEGO Ideas program that brought us this amazing ISS set? LEGO Ideas allows fans to submit their own creative set concepts for the chance to see them become official LEGO products.

So, if you have a dream space station design or any other awesome build idea brewing in your mind, head over to LEGO Ideas and share it with the world! You never know, your creation might just become the next must-have LEGO set for space enthusiasts worldwide.

Pros and Cons of LEGO International Space Station 21321


  • Detailed replica, captures the essence of the real International Space Station
  • With posable solar panels, Canadarm2, mini space shuttle, and astronaut minifigures.
  • Rewarding build experience, challenging and engaging journey
  • Perfect for space enthusiasts and LEGO fans of all ages (16+).
  • Impressive display piece, boasts a significant size
  • Can be a conversation starter and a centerpiece in any space-themed collection.
  • Playable features, posable elements and minifigures allow for interactive play
  • Options for endless space mission recreations.


  • Potentially fragile, due to its size and intricate details, might require careful handling.
  • Limited playability for younger audiences
  • Complexity of the build and smaller pieces make it suitable for older builders
  • Instruction booklet focus, focuses on building instructions than in-depth information about the real ISS.


The LEGO Ideas International Space Station 21321 allow you to go a universe of space exploration and creative possibility.

Whether you're a seasoned LEGO builder or a space enthusiast looking for a unique challenge, this set offers an unforgettable building experience and a stunning display piece that will ignite your imagination.

So, are you ready to launch into your own space adventure? Grab your astronaut suit (figuratively, of course) and get ready to build your very own mini ISS! This set also makes a fantastic gift for space explorers of all ages (16+) – the perfect way to spark curiosity and inspire a love for science and engineering. Happy building!

Light Kit for LEGO® International Space Station 21321

After completing the awe-inspiring LEGO® Ideas International Space Station 21321, can you do something else to make it better! This intricate model embodies the spirit of human ingenuity in space exploration. However, the journey doesn't end here. For discerning builders seeking to elevate their creation to museum-quality status, advanced lighting solutions offer a transformative opportunity.

Imagine your meticulously constructed space station illuminated from within, replicating the ethereal glow of the real ISS as it orbits Earth. Cutting-edge light kits, specifically designed for LEGO® sets, provide a sophisticated approach to enhancing your build. These kits integrate seamlessly with the existing structure, adding a layer of captivating realism through strategically placed LED lights.

Intrigued by the prospect of transforming your LEGO® International Space Station into a luminous masterpiece? Stay tuned for our next exploration, where we delve into the world of advanced lighting solutions and guide you through the process of infusing your creation with breathtaking illumination.

➡️ Click Here to Elevate Your LEGO® International Space Station with Advanced Lighting

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