Skip to content
Back of the Box Builds

Back of the Box Builds

LEGO Alternate Builds!

  • SETS
    • Adventurers
    • Aquazone
    • Belville
    • Building Set with People
    • Castle
    • Duplo
    • Fabuland
    • Harry Potter
    • Holiday and Event
    • LEGOLAND
    • Model Team
    • Pirates
    • Space
    • Star Wars
    • Technic
    • 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 Instructions Added M:Tron M:Tron Alternate Builds Medium Alt Build Medium Builds Space 

6923 – Back C

October 1, 2019October 25, 2021 Master Builder 3491 Views

From: 6923: Particle Ionizer
Name: Suborbital Voyager 1
Instructions: PDF (Photo Sequence)

Contributions

  1. Name and PDF (Photo Sequence) submitted on September 18, 2019 by: plastic.ati
  • ← 6923 – Back B
  • 6881: Lunar Rocket Launcher →

You May Also Like

Encounter at Ice Station Odyssey – Page 6-7

December 14, 2023December 21, 2023 Master Builder

2845 – Back B

October 10, 2023October 10, 2023 Master Builder

6259 – Back C

April 16, 2024April 16, 2024 Master Builder

6481 – Back E

August 31, 2022September 19, 2022 Master Builder

918 – Back A

June 25, 2025June 26, 2025 Master Builder

c80us2

June 3, 2023June 23, 2025 Master Builder

EXPLORE MORE OFFICIAL SETS

6312: Straight Road Plates
Classic Town Official Sets Supplemental Town 

6312: Straight Road Plates

October 10, 2022October 10, 2022 Master Builder

Year Released: 1986Bricklink

730: Steam Shovel with Carrier
Construction LEGOLAND Medium Builds Official Sets 

730: Steam Shovel with Carrier

February 21, 2024February 21, 2024 Master Builder
918: Space Transport
Box Plus Classic Space Classic Space Sets Jens Nygaard Knudsen LL Link Official Sets Playscape/Play Stage Box Small Builds Space 

918: Space Transport

April 27, 2020October 21, 2024 Master Builder
1760: Go-Cart
Classic Town Official Sets Race Town Town Sets Very Small Builds 

1760: Go-Cart

April 11, 2023April 11, 2023 Master Builder
1526: Unknown (Space Radar Buggy)
Classic Space Classic Space Sets Official Sets Small Builds Space 

1526: Unknown (Space Radar Buggy)

April 4, 2020March 14, 2025 Master Builder
7151: Sith Infiltrator
Episode I Medium Builds Official Sets Star Wars Star Wars Sets 

7151: Sith Infiltrator

September 1, 2023September 1, 2023 Master Builder
6363: Auto Service Station
Classic Town Medium Builds Official Sets Town Town Sets Traffic 

6363: Auto Service Station

February 17, 2023February 17, 2023 Master Builder
6984: Galactic Mediator
ABCs Box Marketing Blurb Jørn Thomsen Large Builds Official Sets Space Space Police II Space Police II Sets 

6984: Galactic Mediator

March 18, 2022June 23, 2025 Master Builder
6528: Sand Storm Racer
Official Sets Race Town Town Sets Very Small Builds 

6528: Sand Storm Racer

July 8, 2022July 8, 2022 Master Builder
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
6593: Blaze Battler
Classic Town Fire Medium Builds Official Sets Town Town Sets 

6593: Blaze Battler

November 19, 2020November 19, 2020 Master Builder
1974-4: Star Quest
Bonus/Value Pack Sets Futron Sets Futuron Official Sets Small Builds Space 

1974-4: Star Quest

September 7, 2023September 8, 2023 Master Builder
6515: Stunt Copter
Airport Classic Town Official Sets Town Town Sets Very Small Builds 

6515: Stunt Copter

February 2, 2022February 2, 2022 Master Builder
6024: Bandit Ambush
Castle Castle Sets Dark Forest Official Sets Small Builds 

6024: Bandit Ambush

April 16, 2021April 16, 2021 Master Builder
1843: Space/Castle Value Pack
Bonus/Value Packs Castle Castle Sets Official Sets Royal Knights Small Builds Space Spyrius Spyrius Sets 

1843: Space/Castle Value Pack

January 21, 2021September 13, 2023 Master Builder
4723: Diagon Alley Shops
Box Plus Harry Potter Harry Potter Sets Official Sets Playscape/Play Stage Box Small Builds Sorcerer's Stone 

4723: Diagon Alley Shops

July 10, 2024October 8, 2024 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
  • Belville
  • Building Set with People
  • Castle
  • Duplo
  • Fabuland
  • Harry Potter
  • Holiday and Event
  • LEGOLAND
  • Model Team
  • Pirates
  • Space
  • Star Wars
  • Technic
  • 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 © 2025 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.