How many pieces are in the Moulding Machines?

Moulding Machines contains 795 pieces.

What age is the Moulding Machines recommended for?

This set is recommended for ages 10+.

When was the Moulding Machines released?

Moulding Machines was released in 2011.

🏛 LEGO Exclusive

Set #4000001

Moulding Machines

Moulding Machines is a fascinating glimpse into LEGO's production process.

Before you buy

Who it's for: Ages 10+ · Intermediate build LEGO enthusiasts and collectors interested in the manufacturing process and history of LEGO
Build: 795 pieces · about 4.5 hours Build time is an estimate.
Availability: Likely retired

★★★★☆ 4.6 AI-generated review score, not a customer rating

Collectors highly value this set for its rarity and unique subject matter, providing a glimpse into the LEGO production process. The primary appeal lies in its collectibility and novelty rather than playability, making it a prized possession for dedicated LEGO fans.

Check price on eBay

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

Moulding Machines is a fascinating glimpse into LEGO's production process. This rare set offers a unique opportunity to build a miniature version of the machines that create our beloved bricks, showcasing the inner workings and engineering behind the magic.

This set is perfect for serious LEGO collectors and those interested in the history of the LEGO Group. The build is relatively straightforward, offering an engaging experience for older children and adults who appreciate the behind-the-scenes aspect.

Skip this if you're looking for a set with high playability or a large display model. This set is more of a niche collector's item, so consider Creator Expert vehicles or Architecture sets for more prominent display pieces.

✨ New

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🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

795

Pieces

⏱

4.5h

Estimated Build Time

📊

Intermediate

Difficulty

👤

10+

Ages

Build Highlights:

Replicates the actual LEGO moulding process in a miniature scale
Showcases internal mechanisms with visible gears and moving parts
Features a variety of colorful bricks to simulate the moulding process
Offers a unique educational experience alongside the building fun

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

Not enough price history for a trend

B+

Investment Grade

⏳ Retired

Moulding Machines (4000001-1) is a highly exclusive and rare LEGO set, distributed internally within the LEGO Group. Its limited availability makes it a potentially strong investment, especially for collectors focused on unique and hard-to-find items. The set's unique theme, representing LEGO's own manufacturing process, adds to its appeal. However, the price can be volatile, and its value is heavily dependent on condition and packaging. The set's limited distribution and retirement status significantly increase its desirability among serious collectors.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

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This set is unique in its focus on LEGO's manufacturing process. While there aren't many directly comparable sets, the LEGO Ideas sets often offer unique and innovative builds. Consider sets like 21315-1 Pop-Up Book or 21321-1 International Space Station for similarly themed display models. However, Moulding Machines stands out due to its rarity and insight into LEGO's internal operations.

📦 Parts Inventory

Official piece count: 795
Parts cataloged in this inventory: 112 unique parts, 795 pieces

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Brick 2 x 2 Corner

Part #: 2357 4× Dark Bluish Gray

Brick 2 x 2 Corner

Part #: 2357 3× Light Bluish Gray

Plate 2 x 2 Corner

Part #: 2420 4× Green

Tile 1 x 4 with G...

Part #: 2431 3× Black

Tile 1 x 4 with G...

Part #: 2431 4× Light Bluish Gray

Tile 1 x 4 with G...

Part #: 2431 8× Green

Brick 2 x 6

Part #: 2456 1× Light Bluish Gray

Brick 2 x 6

Part #: 2456 1× Green

Plate Special 1 x...

Part #: 2540 3× Dark Bluish Gray

Tile Special 1 x ...

Part #: 2555 8× Black

Lever Small Base ...

Part #: 298c02 1× Black

Brick 2 x 4

Part #: 3001 7× Green

Brick 2 x 3

Part #: 3002 2× Dark Bluish Gray

Brick 2 x 3

Part #: 3002 5× Tan

Brick 1 x 2

Part #: 3004 10× Green

Brick 1 x 2

Part #: 3004 17× Light Bluish Gray

Brick 1 x 2

Part #: 3004 5× Dark Bluish Gray

Plate Special 1 x...

Part #: 30043 1× Light Bluish Gray

Brick 1 x 1

Part #: 3005 11× Light Bluish Gray

Brick 1 x 1

Part #: 3005 13× Yellow

Brick 1 x 1

Part #: 3005 2× Dark Bluish Gray

Brick 1 x 1

Part #: 3005 4× Green

Brick 1 x 8

Part #: 3008 7× Green

Brick 1 x 8

Part #: 3008 16× Light Bluish Gray

Brick 1 x 6

Part #: 3009 11× Green

Brick 1 x 6

Part #: 3009 11× Light Bluish Gray

Brick 1 x 4

Part #: 3010 2× Dark Bluish Gray

Brick 1 x 4

Part #: 3010 6× Green

Box / Crate with ...

Part #: 30150 1× Yellow

Plate 2 x 4

Part #: 3020 3× Light Bluish Gray

Plate 2 x 4

Part #: 3020 5× Green

Plate 2 x 4

Part #: 3020 3× Dark Bluish Gray

Plate 2 x 3

Part #: 3021 1× Green

Plate 2 x 3

Part #: 3021 8× Dark Bluish Gray

Plate 2 x 3

Part #: 3021 2× Black

Plate 2 x 3

Part #: 3021 1× Yellow

Plate 2 x 2

Part #: 3022 5× Dark Bluish Gray

Plate 2 x 2

Part #: 3022 3× Black

Plate 2 x 2

Part #: 3022 2× Red

Plate 2 x 2

Part #: 3022 3× Green

Plate 1 x 2

Part #: 3023 14× Dark Bluish Gray

Plate 1 x 2

Part #: 3023 7× Black

Plate 1 x 2

Part #: 3023 2× Trans-Clear

Plate 1 x 2

Part #: 3023 4× Green

Plate 1 x 2

Part #: 3023 3× Light Bluish Gray

Plate 1 x 1

Part #: 3024 2× Black

Plate 1 x 1

Part #: 3024 2× Yellow

Plate 1 x 1

Part #: 3024 2× Green

Plate 1 x 1

Part #: 3024 2× Trans-Clear

Plate 1 x 1

Part #: 3024 3× Light Bluish Gray

Plate 1 x 1

Part #: 3024 7× Dark Bluish Gray

Plate 4 x 10

Part #: 3030 1× Black

Plate 4 x 4

Part #: 3031 1× Yellow

Plate 2 x 8

Part #: 3034 4× Dark Bluish Gray

Plate 2 x 8

Part #: 3034 3× Light Bluish Gray

Plate 6 x 8

Part #: 3036 1× Green

Plate 6 x 8

Part #: 3036 4× Dark Bluish Gray

Brick Sloped 45° ...

Part #: 3037 4× Yellow

Bar 4L (Lightsabe...

Part #: 30374 3× Light Bluish Gray

Bar 4L (Lightsabe...

Part #: 30374 2× Black

Brick Sloped 45° ...

Part #: 3039 1× Dark Bluish Gray

Brick Sloped 45° ...

Part #: 3039 2× Green

Brick Sloped 45° ...

Part #: 3040b 1× Green

Brick Special 1 x...

Part #: 30414 3× Dark Bluish Gray

Plate Special 2 x...

Part #: 30586 6× Light Bluish Gray

Brick Round 1 x 1...

Part #: 3062b 2× Trans-Clear

Tile 2 x 2 with G...

Part #: 3068b 4× Green

Tile 1 x 2 with G...

Part #: 3069b 4× Light Bluish Gray

Tile 1 x 2 with G...

Part #: 3069b 14× Green

Tile 1 x 2 with G...

Part #: 3069b 6× Dark Bluish Gray

Tile 1 x 2 with G...

Part #: 3069b 14× Trans-Clear

Tile 1 x 2 with G...

Part #: 3069b 9× Black

Tile 1 x 1 with G...

Part #: 3070b 6× Black

Tile 1 x 1 with G...

Part #: 3070b 12× Dark Bluish Gray

Tile 1 x 1 with G...

Part #: 3070b 4× Green

Technic Axle and ...

Part #: 32016 1× Light Bluish Gray

Technic Axle Conn...

Part #: 32039 1× Light Bluish Gray

Technic Pin Long ...

Part #: 32054 5× Black

Technic Axle 2 No...

Part #: 32062 5× Black

Technic Brick 1 x...

Part #: 32064b 2× Green

Technic Axle 5

Part #: 32073 1× Light Bluish Gray

Technic Bush 1/2 ...

Part #: 32123b 3× Yellow

Technic Bush 1/2 ...

Part #: 32123b 10× Light Bluish Gray

Technic Axle and ...

Part #: 32184 2× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32449 2× Dark Bluish Gray

Technic Beam 1 x ...

Part #: 32449 2× Red

Plate 6 x 14

Part #: 3456 2× Dark Bluish Gray

Plate 1 x 8

Part #: 3460 9× Light Bluish Gray

Plate 1 x 8

Part #: 3460 7× Yellow

Plate 1 x 8

Part #: 3460 11× Green

Brick 1 x 3

Part #: 3622 8× Black

Brick 1 x 3

Part #: 3622 3× Dark Bluish Gray

Brick 1 x 3

Part #: 3622 4× Green

Plate 1 x 3

Part #: 3623 3× Black

Plate 1 x 3

Part #: 3623 10× Dark Bluish Gray

Brick Sloped Inve...

Part #: 3660 2× Green

Brick Sloped Inve...

Part #: 3660 9× Light Bluish Gray

Brick Sloped Inve...

Part #: 3665 2× Green

Plate 1 x 6

Part #: 3666 2× Light Bluish Gray

Plate 1 x 6

Part #: 3666 13× Green

Technic Pin witho...

Part #: 3673 1× Light Bluish Gray

Brick Sloped 75° ...

Part #: 3684 4× Green

Technic Brick 1 x...

Part #: 3700 1× Black

Technic Brick 1 x...

Part #: 3701 7× Light Bluish Gray

Technic Brick 1 x...

Part #: 3701 2× Black

Technic Brick 1 x...

Part #: 3701 2× Dark Bluish Gray

Technic Brick 1 x...

Part #: 3702 1× Black

Technic Brick 1 x...

Part #: 3702 2× Light Bluish Gray

Technic Brick 1 x...

Part #: 3703 1× Black

Technic Axle 12

Part #: 3708 2× Black

Plate 1 x 4

Part #: 3710 5× Dark Bluish Gray

Plate 1 x 4

Part #: 3710 20× Green

Technic Axle Pin ...

Part #: 3749 4× Tan

Plate Special 1 x...

Part #: 3794b 2× Green

Plate 2 x 6

Part #: 3795 3× Light Bluish Gray

Plate 2 x 6

Part #: 3795 2× Dark Bluish Gray

Plate 2 x 6

Part #: 3795 3× Green

Technic Brick 1 x...

Part #: 3894 2× Black

Hinge Brick 1 x 2...

Part #: 3937 2× Red

Brick Round 2 x 2...

Part #: 3941 2× Trans-Clear

Brick Round 2 x 2...

Part #: 3941 1× Orange

Brick Round 2 x 2...

Part #: 3941 2× Green

Cone 2 x 2 x 2, O...

Part #: 3942c 1× Light Bluish Gray

Bracket 2 x 2 - 2...

Part #: 3956 1× Light Bluish Gray

Antenna 1 x 4 wit...

Part #: 3957a 4× Trans-Neon Green

Plate Round 2 x 2...

Part #: 4032a 9× Black

Plate Round 2 x 2...

Part #: 4032a 2× Dark Bluish Gray

Plate Special 1 x...

Part #: 4081b 2× Red

Tile Round 2 x 2 ...

Part #: 4150pr0022 1× Light Bluish Gray

Tile 1 x 8 with G...

Part #: 4162 8× Black

Tile 1 x 8 with G...

Part #: 4162 2× Yellow

Tile 1 x 8 with G...

Part #: 4162 5× Green

Minifig Neckwear ...

Part #: 42446 1× Dark Bluish Gray

Brick Sloped 33° ...

Part #: 4286 2× Green

Technic Axle Pin ...

Part #: 43093 4× Blue

Panel 1 x 4 x 1 w...

Part #: 43337 2× White

Bracket 1 x 2 - 2...

Part #: 44728 4× Green

Bracket 1 x 2 - 2...

Part #: 44728 4× Yellow

Bracket 1 x 2 - 2...

Part #: 44728 2× Dark Bluish Gray

Tap 1 x 1 without...

Part #: 4599b 3× Black

Plate Special 1 x...

Part #: 48336 1× Black

Panel 1 x 2 x 2 [...

Part #: 4864b 12× Trans-Clear

Brick Sloped 30° ...

Part #: 54200 5× Dark Bluish Gray

Brick Sloped 30° ...

Part #: 54200 19× Green

Brick Sloped 30° ...

Part #: 54200 2× Black

Door 1 x 3 x 4 Ri...

Part #: 58380 1× Light Bluish Gray

Door 1 x 3 x 4 Le...

Part #: 58381 1× Light Bluish Gray

Panel 1 x 6 x 5

Part #: 59349 2× Trans-Clear

Technic Axle 5.5 ...

Part #: 59426 2× Dark Bluish Gray

Technic Axle Conn...

Part #: 59443 1× Black

Cone 1 x 1 [Top G...

Part #: 59900 3× Light Bluish Gray

Technic Beam 1 x ...

Part #: 60483 1× Light Bluish Gray

Technic Beam 3 x ...

Part #: 60484 1× Dark Bluish Gray

Panel 1 x 4 x 3 [...

Part #: 60581 1× Trans-Clear

Brick Special 1 x...

Part #: 60583a 2× Yellow

Plate Special 1 x...

Part #: 60897 14× Dark Bluish Gray

Part #: 6141 3× Trans-Neon Orange

Plate Round 1 x 1...

Part #: 6141 16× Orange

Plate Round 1 x 1...

Part #: 6141 3× Trans-Red

Plate Round 1 x 1...

Part #: 6141 6× Blue

Plate Round 1 x 1...

Part #: 6141 6× Dark Bluish Gray

Plate Round 1 x 1...

Part #: 6141 3× Trans-Dark Blue

Plate Round 1 x 1...

Part #: 6141 4× Trans-Clear

Panel 1 x 1 x 1 C...

Part #: 6231 4× Red

Tile 1 x 3

Part #: 63864 3× Dark Bluish Gray

Plate Special 1 x...

Part #: 63868 2× Light Bluish Gray

Bar 6L with Stop ...

Part #: 63965 4× Light Bluish Gray

Equipment Telesco...

Part #: 64644 1× Black

Technic Brick 1 x...

Part #: 6541 2× Green

Technic Pin Long ...

Part #: 6558 4× Blue

Technic Pin with ...

Part #: 6628 2× Black

Technic Beam 1 x ...

Part #: 6632 2× Light Bluish Gray

Tile 1 x 6 with G...

Part #: 6636 7× Light Bluish Gray

Rubber Belt Small...

Part #: 85543 1× White

Brick Sloped 30° ...

Part #: 85984 2× Dark Bluish Gray

Tile 2 x 4 with G...

Part #: 87079 4× Yellow

Tile 2 x 4 with G...

Part #: 87079 7× White

Tile 2 x 4 with G...

Part #: 87079 2× Light Bluish Gray

Tile 2 x 4 with G...

Part #: 87079 8× Black

Brick Special 1 x...

Part #: 87087 4× Black

Brick Special 1 x...

Part #: 87087 4× White

Plate Special 1 x...

Part #: 88072 1× Dark Bluish Gray

Brick Round 2 x 2...

Part #: 92947 2× Light Bluish Gray

Tile Special 2 x ...

Part #: 98549 1× Light Bluish Gray

🧱 Sticker Sheet for...

Part #: 74454 1× [No Color/Any Color]

The set features a variety of basic bricks and plates in green, light bluish gray, and dark bluish gray, offering a good selection for general building and MOCs. The trans-clear panels are useful for adding translucent details to custom creations.