Skip to content

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
THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Large Alt Build Large Builds Space

6971 – Inside A

September 14, 2019October 25, 2021 Master Builder 3248 Views

From: 6971: Inter-Galactic Command Base
Name: Celestial Trireme ¹
Instructions: PDF (Photo Sequence)

Contributions

Name and PDF (Photo Sequence) submitted on February 7, 2021 by: Moriboe

← 897: Mobile Missile Command
6971 – Inside B →

You May Also Like

375-1 – Back I

September 11, 2023September 11, 2023 Master Builder

6040 – Back B

August 8, 2024September 25, 2024 Master Builder

535 – Side L

May 15, 2023August 1, 2023 Master Builder

1484 – Back D

December 28, 2021December 28, 2021 Master Builder

1896 – Back E

April 4, 2022April 4, 2022 Master Builder

7144 – Back C

October 28, 2021October 28, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

Large Builds Official Sets Technic Technic Sets

8064: Universal Motor Set 9V

February 8, 2024February 8, 2024 Master Builder

Year Released: 1990BricklinkInstructions

Airport LEGOLAND Medium Builds Official Sets

371-3: Seaplane

October 8, 2024October 8, 2024 Master Builder

Classic Town Large Builds Official Sets Race Town Town Sets

6484: F1 Hauler

March 21, 2023March 21, 2023 Master Builder

Duplo Duplo Sets Official Sets Playhouse Small Builds

2551: Grandma’s Kitchen

February 27, 2023February 27, 2023 Master Builder

ABCs Castle Castle Sets Extra Large Builds Lion Knights Niels Milan Pedersen Official Sets

6080: King’s Castle

October 5, 2019August 16, 2023 Master Builder

Official Sets Pirates Pirates I Pirates Sets Small Builds

6258: Smuggler’s Shanty

July 8, 2022July 8, 2022 Master Builder

Classic Space Classic Space Sets Large Builds Official Sets

6940: Alien Moon Stalker

September 12, 2019September 12, 2024 Master Builder

Medium Builds Official Sets Town Town Sets

6551: Checkered Flag 500

November 21, 2023November 21, 2023 Master Builder

Official Sets Pirates Pirates I Pirates Sets Very Small Builds

1747: Treasure Cave

May 6, 2022May 6, 2022 Master Builder

Life on Mars Life on Mars Sets Official Sets Very Small Builds

7300 (1414, 7308, Kabaya: Life On Mars 1): Double Hover

February 24, 2025February 25, 2025 Master Builder

Extra Large Builds Model Team Model Team Sets Official Sets

5581: Magic Flash

January 2, 2024January 2, 2024 Master Builder

Classic Town Official Sets Police Small Builds Town Town Sets

6681: Police Van

October 13, 2021October 13, 2021 Master Builder

Adventurers Adventurers Sets Desert Medium Builds Official Sets

5948: Desert Expedition

October 8, 2024October 8, 2024 Master Builder

Fabuland Fabuland Sets Official Sets Very Small Builds

3721: Clive Crocodile on Skateboard

February 26, 2023August 1, 2023 Master Builder

Castle Castle Sets Lion Knights Medium Builds Official Sets

6061: Siege Tower

January 6, 2022January 6, 2022 Master Builder

Classic Town Coast Guard Medium Builds Official Sets Town Town Sets

6342: Beach Rescue Chopper

July 15, 2022July 15, 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
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 © 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.