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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 4536 Views

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

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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 4358 Views

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

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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 5111 Views

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

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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 5004 Views

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

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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 5371 Views

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

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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 4660 Views

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

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EXPLORE MORE OFFICIAL SETS

7310: Mono Jet
Life on Mars Life on Mars Sets Official Sets Very Small Builds 

7310: Mono Jet

April 16, 2021April 16, 2021 Master Builder

Year Released: 2001BricklinkInstructions

4704: The Chamber of the Winged Keys
Harry Potter Harry Potter Sets Medium Builds Official Sets Sorcerer's Stone 

4704: The Chamber of the Winged Keys

May 28, 2024May 28, 2024 Master Builder
6276: Eldorado Fortress
Box Story Daniel August Krentz Extra Large Builds Imperial Soldiers Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets 

6276: Eldorado Fortress

January 28, 2022April 3, 2024 Master Builder
1794 – Side R
Bonus/Value Packs Castle Castle Alternate Builds Dragon Knights Official Sets Small Builds 

1794 – Side R

March 30, 2026March 30, 2026 Master Builder
6878: Sub Orbital Guardian
ABCs Bjarne Tveskov Blacktron II Blacktron II Sets Official Sets Small Builds 

6878: Sub Orbital Guardian

October 4, 2019August 14, 2023 Master Builder
6736: Beach Lookout
Island Xtreme Stunts Island Xtreme Stunts Sets Medium Builds Official Sets 

6736: Beach Lookout

April 7, 2026April 7, 2026 Master Builder
3439: Spy Runner
Airport Classic Town Medium Builds Official Sets Town Town Sets 

3439: Spy Runner

May 11, 2022May 11, 2022 Master Builder
5925: Pontoon Plane
Adventurers Adventurers Sets Jungle Official Sets Small Builds 

5925: Pontoon Plane

March 5, 2026March 5, 2026 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
6645: Street Sweeper
Classic Town Official Sets Small Builds Town Town Sets Traffic 

6645: Street Sweeper

November 20, 2020November 20, 2020 Master Builder
4525: Road and Rail Repair
9V Official Sets Small Builds Town Train Train Sets 

4525: Road and Rail Repair

July 22, 2026July 22, 2026 Master Builder
6958: Android Base
Exploriens Exploriens Sets Large Builds Official Sets 

6958: Android Base

November 9, 2019April 16, 2021 Master Builder
6880: Surface Explorer
Classic Space Classic Space Sets Official Sets Small Builds Space 

6880: Surface Explorer

May 4, 2020May 4, 2020 Master Builder
120270: The Great Technic Racer
Medium Builds Official Sets Super Model Technic Technic Alternate Builds Technic Sets 

120270: The Great Technic Racer

March 8, 2025March 8, 2025 Master Builder
6536: Aero Hawk
Airport Classic Town Official Sets Small Builds Town Town Sets 

6536: Aero Hawk

January 22, 2026January 22, 2026 Master Builder
6369: Garage
Classic Town Medium Builds Official Sets Town Town Sets Traffic 

6369: Garage

December 1, 2023December 2, 2023 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.