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Back of the Box Builds

LEGO Alternate Builds!

  • SETS
    • Adventurers
    • Aquazone
    • Belville
    • Building Set with People
    • Castle
    • Duplo
    • Fabuland
    • Harry Potter
    • Holiday and Event
    • LEGOLAND
    • Model Team
    • Pirates
    • Space
    • Star Wars
    • Technic
    • Town
    • Universal Building Set
    • Western
    • More Sets
    • Misc
  • USEFUL LINKS
    • Submit Instructions!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Sea-Tron

ABCs Concepts and Prototypes Sea People Sea-Tron Space 

Sea People

February 12, 2025February 12, 2025 Master Builder 5339 Views

MiscTheme: Seatron, Aquadome *Alternate Build Connection: Aquazone BrickJournal: Issue 6 Volume 2 – Page 43TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal

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ABCs Concepts and Prototypes Sea People Sea-Tron Space 

Aquadome

February 11, 2025February 18, 2025 Master Builder 5620 Views

MiscTheme: Seatron, Sea People *Alternate Build Connection: Aquazone, 6195: Neptune Discovery Lab (Aqua Dome 7), 6199: Hydro Crystalization Station LEGO®

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ABCs Concepts and Prototypes Sea People Sea-Tron Space 

Seatron

February 23, 2023February 12, 2025 Master Builder 5799 Views

MiscTheme: Seatron, Sea People, Aquadome *Alternate Build Connection: Aquazone BrickJournal: Issue 6 Volume 2 – Page 43TwoMorrows PublishingPhoto Credit: Niels

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Concepts and Prototypes Sea People Sea-Tron Space 

BrickJournal Issue 6 Volume 2 Page 43 – Proto 1

February 23, 2023August 15, 2023 Master Builder 4799 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives

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Concepts and Prototypes Sea People Sea-Tron Space 

BrickJournal Issue 6 Volume 2 Page 43 – Concept 1

February 23, 2023August 15, 2023 Master Builder 3602 Views

BrickJournal Issue 6 Volume 2TwoMorrows PublishingPhoto Credit: Niels Milan Pedersen’s personal LEGO archives

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EXPLORE MORE OFFICIAL SETS

885: Space Scooter
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

885: Space Scooter

January 27, 2024January 27, 2024 Master Builder

Year Released: 1979BricklinkInstructions

3676: Catherine Cat’s Fun Park
Box Story Fabuland Fabuland Sets Official Sets Small Builds 

3676: Catherine Cat’s Fun Park

March 1, 2025March 1, 2025 Master Builder
5581: Magic Flash
Extra Large Builds Model Team Model Team Sets Official Sets 

5581: Magic Flash

January 2, 2024January 2, 2024 Master Builder
6271: Imperial Flagship
Box Story Imperial Guards Large Builds Official Sets Pirates Pirates I Pirates Sets 

6271: Imperial Flagship

January 6, 2022February 20, 2025 Master Builder
801: Gear Set
Gears Medium Builds Official Sets Universal Building Set 

801: Gear Set

December 17, 2025December 17, 2025 Master Builder
1630: Helicopter
Airport Classic Town Official Sets Town Town Sets Very Small Builds 

1630: Helicopter

April 8, 2025April 8, 2025 Master Builder
510: Basic Building Set
Basic Official Sets Small Builds Universal Building Set 

510: Basic Building Set

July 11, 2024July 11, 2024 Master Builder
6950: Mobile Rocket Transport
Classic Space Classic Space Sets Medium Builds Niels Milan Pedersen Official Sets Space 

6950: Mobile Rocket Transport

January 12, 2021July 29, 2023 Master Builder
6662: Backhoe
Classic Town Construction Official Sets Small Builds Town Town Sets 

6662: Backhoe

July 8, 2022July 8, 2022 Master Builder
9401: M:Tron Team
Bonus/Value Pack Sets Bonus/Value Packs M:Tron M:Tron Sets Official Sets Space Very Small Builds 

9401: M:Tron Team

February 18, 2026March 7, 2026 Master Builder
1371: Spinosaurus Attack Studio
Jurassic Park III Medium Builds Official Sets Studio Alternate Builds Studio Sets Studios 

1371: Spinosaurus Attack Studio

January 6, 2022June 4, 2024 Master Builder
6809: XT-5 and Droid
Classic Space Classic Space Sets Official Sets Very Small Builds 

6809: XT-5 and Droid

April 4, 2020April 4, 2020 Master Builder
891: Two-Man Scooter
Classic Space Classic Space Sets Official Sets Small Builds Space 

891: Two-Man Scooter

March 15, 2024March 15, 2024 Master Builder
6546: Slick Racer
Official Sets Town Town Sets Very Small Builds 

6546: Slick Racer

May 23, 2022May 23, 2022 Master Builder
6021: Jousting Knights
Castle Castle Sets Lion Knights Official Sets Very Small Builds 

6021: Jousting Knights

September 25, 2024September 25, 2024 Master Builder
6355: Derby Trotter
Classic Town Medium Builds Official Sets Recreation Town Town Sets 

6355: Derby Trotter

December 28, 2021December 28, 2021 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

Logo
There were once pictures of additional LEGO® builds on the back of set boxes. Written on the boxes was typically something about the endless building possibilities, "Build any of these exciting models with this set!" There were no instructions for these alternate builds, until now.

Sets

  • Adventurers
  • Aquazone
  • Belville
  • Building Set with People
  • Castle
  • Duplo
  • Fabuland
  • Harry Potter
  • Holiday and Event
  • LEGOLAND
  • Model Team
  • Pirates
  • Space
  • Star Wars
  • Technic
  • Town
  • Universal Building Set
  • Western
  • More Sets
  • Misc

Useful Links

  • Submit Instructions!
  • New Instructions
  • New Official Sets
  • New Alternate Builds
  • Minifigs
  • Very Small Builds (<35 pcs)
  • Small Builds (<100 pcs)
  • Medium Builds (<200 pcs)
  • Large Builds (<400 pcs)
  • Extra Large Builds (>400 pcs)
  • How BOTBB was Built

In Honor of 1526

The classic space set that never was.

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