Skip to content
Back of the Box Builds

Back of the Box Builds

LEGO Alternate Builds!

  • SETS
    • Adventurers
    • Aquazone
    • Belville
    • BATMAN™
    • BIONICLE
    • Building Set with People
    • Castle
    • Duplo
    • Fabuland
    • Harry Potter
    • Holiday and Event
    • LEGOLAND
    • Model Team
    • Pirates
    • Space
    • Star Wars
    • Technic
    • Train
    • 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
Alternate Builds Res-Q Small Builds Town Town Alternate Builds 

6431 – Back B

January 20, 2022January 20, 2022 Master Builder 4133 Views

From: 6431: Road Rescue
Name: TBD
Submitted by: USER
Instructions:

  • ← 6431 – Back A
  • 6431 – Back C →

You May Also Like

6909: Sonic Stinger with Promotional Mask

October 4, 2024March 22, 2025 Master Builder

6345 – Back E

January 29, 2021September 15, 2022 Master Builder

565 – Bottom

December 28, 2023July 11, 2024 Master Builder

Book 226 – Page 64-65

November 8, 2021November 11, 2021 Master Builder

6391 – Back G

March 13, 2024March 13, 2024 Master Builder

7140 – Back A

April 8, 2026April 18, 2026 Master Builder

EXPLORE MORE OFFICIAL SETS

6581: Dig N’ Dump
Classic Town Construction Medium Builds Official Sets Town Town Sets 

6581: Dig N’ Dump

November 7, 2022November 7, 2022 Master Builder

Year Released: 1996BricklinkInstructions

7150: TIE Fighter & Y-wing
Large Builds Official Sets Star Wars Star Wars Sets 

7150: TIE Fighter & Y-wing

April 21, 2026April 21, 2026 Master Builder
4709: Hogwarts Castle
Extra Large Builds Harry Potter Harry Potter Sets Official Sets Sorcerer's Stone 

4709: Hogwarts Castle

April 16, 2021July 13, 2021 Master Builder
2551: Grandma’s Kitchen
Duplo Duplo Sets Official Sets Playhouse Small Builds 

2551: Grandma’s Kitchen

February 27, 2023February 27, 2023 Master Builder
1761: Paradisa Speedboat
Official Sets Paradisa Town Town Sets Very Small Builds 

1761: Paradisa Speedboat

April 10, 2023April 10, 2023 Master Builder
5978: Sphinx Secret Surprise
Adventurers Adventurers Sets Desert Large Builds Official Sets 

5978: Sphinx Secret Surprise

October 28, 2019April 4, 2020 Master Builder
1789: Star Hawk II
Medium Builds Official Sets Space Unitron Unitron Sets 

1789: Star Hawk II

July 18, 2020July 18, 2020 Master Builder
6630: Bucket Loader
Classic Town Construction Official Sets Town Town Sets Very Small Builds 

6630: Bucket Loader

October 13, 2021October 13, 2021 Master Builder
6543: Sail N’ Fly Marina
Classic Town Extra Large Builds Harbor Official Sets Town Town Sets Wrecker 

6543: Sail N’ Fly Marina

July 22, 2022July 22, 2022 Master Builder
7711: Sentry
Exo-Force Official Sets Small Builds 

7711: Sentry

August 11, 2023August 11, 2023 Master Builder
6765: Gold City Junction
Jørn Thomsen Large Builds Official Sets Western Western Sets 

6765: Gold City Junction

November 10, 2019July 29, 2023 Master Builder
1737: Scorpion Detector (Limited Edition)
Box Plus Different Box Versions Exploriens Exploriens Sets Medium Builds Official Sets 

1737: Scorpion Detector (Limited Edition)

March 5, 2026March 5, 2026 Master Builder
1969-2: Space Value Pack
Bonus/Value Packs Classic Space Classic Space Sets Duplicate Set Number Official Sets Small Builds Space 

1969-2: Space Value Pack

January 29, 2025January 29, 2025 Master Builder
7261: Clone Turbo Tank
Episode III Extra Large Builds Official Sets Star Wars Star Wars Sets 

7261: Clone Turbo Tank

March 1, 2023March 1, 2023 Master Builder
6571: Flame Fighters
Box Story Classic Town Fire Large Builds Official Sets Town Town Sets 

6571: Flame Fighters

August 10, 2026August 10, 2026 Master Builder
3056: Go-Kart
Classic Town Official Sets Race Town Town Sets Very Small Builds 

3056: Go-Kart

July 26, 2020July 26, 2020 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
  • BATMAN
  • Bionicle
  • Belville
  • Building Set with People
  • Castle
  • Duplo
  • Fabuland
  • Harry Potter
  • Holiday and Event
  • LEGOLAND
  • Model Team
  • Pirates
  • Space
  • Star Wars
  • Technic
  • Train
  • 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.

Copyright © 2026 Back of the Box Builds. All rights reserved. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize, or endorse this site.