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

Model Team Alternate Builds

Alternate Builds Instructions Added Large Alt Build Large Builds Model Team Model Team Alternate Builds 

5540 – Back A

February 10, 2026March 4, 2026 Master Builder 4499 Views

From: 5540: Formula I RacerName: TBD Instructions: View PDF | Download .io File

Read more
Alternate Builds Instructions Added Large Alt Build Large Builds Model Team Model Team Alternate Builds 

5510 – Back A

February 10, 2026March 4, 2026 Master Builder 4325 Views

From: 5510: Off Road 4×4Name: TBD Instructions: View PDF | Download .io File

Read more
Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Model Team Model Team Alternate Builds 

5580 – Back A

February 9, 2026March 4, 2026 Master Builder 5065 Views

From: 5580: Highway RigName: TBD Instructions: View PDF | Download .io File

Read more
Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Model Team Model Team Alternate Builds 

5550 – Back A

February 9, 2026March 4, 2026 Master Builder 4958 Views

From: 5550: Custom Rally VanName: TBD Instructions: View PDF | Download .io File

Read more
Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Model Team Model Team Alternate Builds 

5581 – Back A

January 31, 2026March 4, 2026 Master Builder 5316 Views

From: 5581: Magic FlashName: TBD Instructions: View PDF | Download .io File

Read more
Alternate Builds Instructions Added Large Alt Build Large Builds Model Team Model Team Alternate Builds 

5521 – Back A

January 29, 2026March 4, 2026 Master Builder 4594 Views

From: 5521: Sea JetName: TBD Instructions: View PDF | Download .io File

Read more

EXPLORE MORE OFFICIAL SETS

6452: Mini Rocket Launcher
Official Sets Space Port Town Town Sets Very Small Builds 

6452: Mini Rocket Launcher

October 3, 2024October 3, 2024 Master Builder

Year Released: 1999BricklinkInstructions

6651: Post Office Van
Classic Town Official Sets Post Office Small Builds Town Town Sets 

6651: Post Office Van

February 3, 2021February 3, 2021 Master Builder
6280: Armada Flagship
Box Story Imperial Armada Large Builds Official Sets Pirates Pirates I Pirates Sets 

6280: Armada Flagship

July 13, 2021February 20, 2025 Master Builder
1597: Castle 3-Pack
Bonus/Value Pack Sets Bonus/Value Packs Official Sets Small Builds 

1597: Castle 3-Pack

July 22, 2024January 20, 2026 Master Builder
770: Rescue Set
Hospital LEGOLAND Medium Builds Official Sets 

770: Rescue Set

September 15, 2022February 14, 2024 Master Builder
6387: Coastal Rescue Base
Classic Town Coast Guard Large Builds Official Sets Town Town Sets 

6387: Coastal Rescue Base

July 15, 2022July 15, 2022 Master Builder
7259: ARC-170 Starfighter
Episode III Large Builds Official Sets Star Wars Star Wars Sets 

7259: ARC-170 Starfighter

March 1, 2023March 1, 2023 Master Builder
6926: Mobile Recovery Vehicle
Classic Space Classic Space Sets Medium Builds Official Sets Space 

6926: Mobile Recovery Vehicle

October 12, 2021October 12, 2021 Master Builder
6344: Jet Speed Justice
Classic Town Medium Builds Official Sets Police Town Town Sets 

6344: Jet Speed Justice

October 8, 2024October 8, 2024 Master Builder
6356: Med-Star Rescue Plane
Classic Town Hospital Medium Builds Official Sets Town Town Sets 

6356: Med-Star Rescue Plane

March 16, 2022March 16, 2022 Master Builder
6822: Space Digger
Classic Space Classic Space Sets Official Sets Small Builds Space 

6822: Space Digger

March 12, 2024March 12, 2024 Master Builder
6921: Monorail Accessory Track
Futuron Official Sets Space Supplemental 

6921: Monorail Accessory Track

September 1, 2023January 22, 2026 Master Builder
6237: Pirates’ Plunder
Official Sets Pirates Pirates I Pirates Sets Very Small Builds 

6237: Pirates’ Plunder

February 8, 2022February 8, 2022 Master Builder
7785: Arkham Asylum
Batman I BATMAN™ BATMAN™ Sets Extra Large Builds Official Sets 

7785: Arkham Asylum

March 30, 2026March 30, 2026 Master Builder
6623: Police Car
Classic Town Official Sets Police Town Town Sets Very Small Builds 

6623: Police Car

October 13, 2021October 13, 2021 Master Builder
6480: Hook and Ladder Truck
Classic Town Fire Medium Builds Official Sets Town Town Sets 

6480: Hook and Ladder Truck

July 8, 2022July 8, 2022 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.