Skip to content

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
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 5132 Views

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

Contributions

Name and PDF (Photo Sequence) submitted on September 18, 2019 by: plastic.ati

← 6923 – Back B
6881: Lunar Rocket Launcher →

You May Also Like

725 – Back B

July 22, 2024July 22, 2024 Master Builder

4762: Rescue from the Merpeople

May 16, 2023May 16, 2023 Master Builder

6901-2 – Back A

December 16, 2025December 16, 2025 Master Builder

6085 – Inside B

July 13, 2021October 28, 2021 Master Builder

730: Steam Shovel with Carrier

February 21, 2024February 21, 2024 Master Builder

6553 – Back D

December 4, 2023December 4, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

Classic Space Classic Space Sets Large Builds Official Sets Space

6970: Beta-1 Command Base

January 20, 2021January 20, 2021 Master Builder

Year Released: 1980BricklinkInstructions

Medium Builds Official Sets Time Cruisers Time Cruisers Sets

6492: Hypno Cruiser

December 29, 2021March 20, 2025 Master Builder

Futuron Official Sets Space Supplemental

6921: Monorail Accessory Track

September 1, 2023January 22, 2026 Master Builder

Cowboys Official Sets Very Small Builds Western Western Sets

6712: Sheriff’s Showdown

October 10, 2023October 10, 2023 Master Builder

Classic Town Off-Road Official Sets Small Builds Town Town Sets

6660: Hook and Haul Wrecker

June 23, 2025June 23, 2025 Master Builder

Classic Space Classic Space Sets Official Sets Space Supplemental

454: Two Lunar Landing Plates

July 11, 2024July 11, 2024 Master Builder

Classic Space Classic Space Sets Medium Builds Official Sets

6891: Gamma-V Laser Craft

September 13, 2019August 3, 2024 Master Builder

Extra Large Builds Official Sets Studio Sets Studios

1382: Scary Laboratory

August 10, 2026August 10, 2026 Master Builder

Official Sets Power Miners Power Miners Sets Small Builds

8957: Mine Mech

March 27, 2026March 27, 2026 Master Builder

Blacktron II Blacktron II Sets Official Sets Very Small Builds

6832: Super Nova II

October 5, 2019October 5, 2019 Master Builder

ABCs Castle Castle Sets Classic Castle Daniel August Krentz Different Set Numbers Duplicate Set Number Extra Large Builds Official Sets

375-2 (6075-2): Castle

November 8, 2019September 5, 2025 Master Builder

Bonus/Value Packs Futron Sets Futuron Official Sets Small Builds Space

1616: Space Combi-Pack

September 6, 2023September 6, 2023 Master Builder

Classic Town Harbor Official Sets Town Town Sets Very Small Builds Wrecker

1632: Motor Boat

July 25, 2024July 25, 2024 Master Builder

Classic Space Classic Space Sets Medium Builds Niels Milan Pedersen Official Sets Space

6950: Mobile Rocket Transport

January 12, 2021July 29, 2023 Master Builder

Classic Town Official Sets Small Builds Town Town Sets Traffic

6524: Blizzard Blazer

June 28, 2022June 28, 2022 Master Builder

Black Falcons Castle Castle Sets Official Sets Small Builds

6030: Catapult

April 2, 2022April 2, 2022 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

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.