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 Instructions Added M:Tron M:Tron Alternate Builds Medium Alt Build Medium Builds Space 

6923 – Back C

October 1, 2019October 25, 2021 Master Builder 5613 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

4950 – Back A

November 10, 2019December 16, 2019 Master Builder

6402 – Back A

October 5, 2019November 18, 2021 Master Builder

6040 – Back A

August 8, 2024September 25, 2024 Master Builder

6871 – Back B

September 27, 2019October 25, 2021 Master Builder

6746 – Back A

December 22, 2023January 1, 2024 Master Builder

6972 – Back C

September 15, 2019November 21, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

6982: Explorien Starship
Exploriens Exploriens Sets Extra Large Builds Official Sets 

6982: Explorien Starship

November 9, 2019December 13, 2024 Master Builder

Year Released: 1996BricklinkInstructions (Revision/Addition: P41, Step 35)

6067: Guarded Inn
Castle Castle Sets Daniel August Krentz Large Builds Lion Knights Official Sets 

6067: Guarded Inn

February 9, 2021July 29, 2023 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
6561: Hot Rod Club
Medium Builds Official Sets Town Town Sets 

6561: Hot Rod Club

November 10, 2019June 3, 2026 Master Builder
6848: Strategic Pursuer
Bjarne Tveskov Duplicate Set Number Futron Sets Futuron Official Sets Small Builds Space 

6848: Strategic Pursuer

April 16, 2021March 11, 2024 Master Builder
1731 (1711, Kabaya: Space 4): Ice Planet Scooter
Ice Planet 2002 Ice Planet 2002 Sets Jørn Thomsen Official Sets Space Very Small Builds 

1731 (1711, Kabaya: Space 4): Ice Planet Scooter

April 6, 2020March 10, 2025 Master Builder
6180: Hydro Search Sub
Aquazone Aquazone Sets Box Story Hydronauts Large Builds Official Sets 

6180: Hydro Search Sub

February 18, 2025February 18, 2025 Master Builder
6718: Raindance Ridge (Rain Dance Ridge)
Indians Jørn Thomsen Official Sets Small Builds Western Western Sets 

6718: Raindance Ridge (Rain Dance Ridge)

August 4, 2020July 29, 2023 Master Builder
6271: Imperial Flagship
Box Story Imperial Guards Large Builds Official Sets Pirates Pirates I Pirates Sets 

6271: Imperial Flagship

January 6, 2022February 20, 2025 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
4582: Red Bullet
Drome Racers Official Sets Racers Very Small Builds 

4582: Red Bullet

October 23, 2021February 21, 2025 Master Builder
6532: Diesel Dumper
Classic Town Construction Official Sets Town Town Sets Very Small Builds 

6532: Diesel Dumper

November 19, 2020November 19, 2020 Master Builder
510: Basic Building Set
Basic Official Sets Small Builds Universal Building Set 

510: Basic Building Set

July 11, 2024July 11, 2024 Master Builder
6820: Starfire I
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

6820: Starfire I

January 12, 2021January 12, 2021 Master Builder
6802: Space Probe
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

6802: Space Probe

October 10, 2022October 10, 2022 Master Builder
6335: Indy Transport
Classic Town Medium Builds Official Sets Race Town Town Sets 

6335: Indy Transport

November 29, 2023November 29, 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.