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
Jørn Thomsen Official Sets Small Builds Space Space Police II Space Police II Sets 

6852: Sonar Security

September 22, 2020July 29, 2023 Master Builder 6822 Views

Year Released: 1993
Designer: Jørn Thomsen
Bricklink
Instructions

Back A
Back B
Back C
  • ← 6901: Mobile Lab
  • 6852 – Back A →

You May Also Like

6479: Emergency Response Center

April 16, 2021January 20, 2022 Master Builder

6928 – Back C

January 12, 2021January 12, 2021 Master Builder

928 – Back E

August 13, 2024August 15, 2024 Master Builder

6493: Flying Time Vessel

July 14, 2021December 29, 2021 Master Builder

6649 – Back C

July 8, 2022July 11, 2022 Master Builder

885 – Back C

January 27, 2024May 13, 2026 Master Builder

EXPLORE MORE OFFICIAL SETS

6941: Battrax
Blacktron Blacktron Sets Box Marketing Blurb Large Builds Official Sets 

6941: Battrax

September 13, 2019March 28, 2026 Master Builder

Year Released: 1987BricklinkInstructions The box reads, “Creativity and Quality Craftsmanship are the key ingredients in this and all LEGO® brand building sets.

6470: Mini-dumper
Construction Official Sets Town Town Jr Town Sets Very Small Builds 

6470: Mini-dumper

July 10, 2026July 10, 2026 Master Builder
6938: Scorpion Detector
Exploriens Exploriens Sets Medium Builds Official Sets 

6938: Scorpion Detector

March 21, 2023March 5, 2026 Master Builder
6056: Dragon Wagon
Castle Castle Sets Dragon Knights Official Sets Small Builds 

6056: Dragon Wagon

December 28, 2021June 30, 2022 Master Builder
10182: Café Corner
Creator Expert Extra Large Builds Modular Buildings Collection Official Sets 

10182: Café Corner

January 23, 2024January 23, 2024 Master Builder
4555: Cargo Station
9V Large Builds Official Sets Town Train Train Sets 

4555: Cargo Station

January 2, 2024January 2, 2024 Master Builder
4940: Granite Grinder
Official Sets Rock Raiders Rock Raiders Sets Small Builds 

4940: Granite Grinder

April 4, 2020April 4, 2020 Master Builder
6698: RV with Speedboat
Classic Town Harbor Medium Builds Official Sets Town Town Sets Wrecker 

6698: RV with Speedboat

June 28, 2022June 28, 2022 Master Builder
6509: Red Devil Racer
Classic Town Official Sets Small Builds Town Town Sets Traffic 

6509: Red Devil Racer

October 12, 2021October 12, 2021 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
4554: Metro Station
9V Extra Large Builds Official Sets Town Train Train Sets 

4554: Metro Station

August 10, 2026August 10, 2026 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
725-3: Town Plan
Large Builds Official Sets Samsonite Samsonite Sets Town Town Sets 

725-3: Town Plan

October 9, 2024October 9, 2024 Master Builder
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
1723: Castle / Pirates Combi Pack
Bonus/Value Packs Castle Castle Sets Dragon Knights Imperial Guards Official Sets Pirates Pirates I Pirates Sets Small Builds 

1723: Castle / Pirates Combi Pack

March 30, 2026March 30, 2026 Master Builder
6530: Sport Coupe (City Car)
Classic Town Official Sets Town Town Sets Traffic Very Small Builds 

6530: Sport Coupe (City Car)

April 4, 2020April 19, 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
  • 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.