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 4132 Views

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

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

You May Also Like

6594 – Back B

February 5, 2023July 15, 2025 Master Builder

6829 – Back B

April 14, 2023April 17, 2024 Master Builder

6932 – Back D

September 24, 2019January 10, 2022 Master Builder

6462 – Back B

July 10, 2026July 10, 2026 Master Builder

920 – Back C

February 2, 2021October 25, 2021 Master Builder

710 – Inside E

February 22, 2024February 22, 2024 Master Builder

EXPLORE MORE OFFICIAL SETS

4706: Forbidden Corridor
Harry Potter Harry Potter Sets Large Builds Official Sets Sorcerer's Stone 

4706: Forbidden Corridor

February 27, 2023February 27, 2023 Master Builder

Year Released: 2001BricklinkInstructions

6508: Wave Racer
Official Sets Race Town Town Sets Very Small Builds 

6508: Wave Racer

October 23, 2026October 23, 2026 Master Builder
5847: Surfers’ Paradise
Belville Belville Sets Lion Knights Medium Builds Official Sets Recreation 

5847: Surfers’ Paradise

April 2, 2025April 2, 2025 Master Builder
1896: Trauma Team
Classic Town Hospital Large Builds Official Sets Town Town Sets 

1896: Trauma Team

April 4, 2022April 4, 2022 Master Builder
4714: Gringott’s Bank
Harry Potter Harry Potter Sets Medium Builds Official Sets Sorcerer's Stone 

4714: Gringott’s Bank

March 2, 2023March 2, 2023 Master Builder
6815: Hovertron
Exploriens Exploriens Sets Official Sets Space Very Small Builds 

6815: Hovertron

June 28, 2022June 28, 2022 Master Builder
6925: Interplanetary Rover
Bjarne Tveskov Futron Sets Futuron Medium Builds Official Sets 

6925: Interplanetary Rover

September 25, 2019July 29, 2023 Master Builder
4591: Star Strike
Drome Racers Official Sets Racers Very Small Builds 

4591: Star Strike

February 21, 2025February 21, 2025 Master Builder
194: Family
Building Set with People Building Set with People Sets Official Sets Small Builds 

194: Family

October 4, 2019October 6, 2019 Master Builder
6883: Terrestrial Rover
Classic Space Classic Space Sets Official Sets Small Builds Space 

6883: Terrestrial Rover

October 22, 2019October 21, 2024 Master Builder
6357: Stunt ‘Copter N’ Truck
Classic Town Medium Builds Official Sets Town Town Sets Traffic 

6357: Stunt ‘Copter N’ Truck

January 28, 2022January 28, 2022 Master Builder
720: Basic Building Set
Basic Large Builds Official Sets Universal Building Set 

720: Basic Building Set

February 8, 2024February 9, 2024 Master Builder
4735: Slytherin
Chamber of Secrets Harry Potter Harry Potter Sets Official Sets Small Builds 

4735: Slytherin

February 27, 2023February 27, 2023 Master Builder
550-2: Windmill
Building LEGOLAND Medium Builds Official Sets 

550-2: Windmill

March 3, 2026March 3, 2026 Master Builder
6367: Truck
Cargo Classic Town Medium Builds Official Sets Town Town Sets 

6367: Truck

February 17, 2023February 17, 2023 Master Builder
6841: Mineral Detector
Classic Space Classic Space Sets Official Sets Very Small Builds 

6841: Mineral Detector

October 3, 2019October 3, 2019 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.