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 Medium Alt Build Medium Builds Space

6901 – Back A

August 25, 2023March 14, 2025 Master Builder 3767 Views

From: 6901: Mobile Lab
Name: Space Lab Tower ¹
Instructions: View PDF | Download .io File

Contributions

Name, PDF and .io file submitted August 26, 2023 by: Mr.AstonishedRaccoon

← 6035 – Back D
6901 – Back B →

You May Also Like

6848 – Back B

March 11, 2024March 11, 2024 Master Builder

5956 – Back A

August 31, 2024August 31, 2024 Master Builder

6483 – Back D

December 29, 2021December 29, 2021 Master Builder

Blacktron II Prototypes

February 23, 2023February 11, 2025 Master Builder

6469 – Back C

March 3, 2025March 3, 2025 Master Builder

6369 – Back A

December 1, 2023December 2, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

Black Knights Castle Castle Sets Medium Builds Official Sets

6059: Knight’s Stronghold

July 13, 2021July 13, 2021 Master Builder

Year Released: 1990BricklinkInstructions

Blacktron II Blacktron II Sets Jørn Thomsen Medium Builds Official Sets Space

6933: Spectral Starguider

April 13, 2020February 11, 2025 Master Builder

Classic Town Official Sets Supplemental Town

6313: Cross-Road Plates

October 10, 2022October 10, 2022 Master Builder

Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets Small Builds

6260: Shipwreck Island

April 9, 2020July 29, 2023 Master Builder

Jørn Thomsen Large Builds Official Sets Western Western Sets

6765: Gold City Junction

November 10, 2019July 29, 2023 Master Builder

Classic Town Gas Station Medium Builds Official Sets Town Town Sets Wrecker

6562: Gas Stop Shop

September 19, 2022September 19, 2022 Master Builder

Classic Town Fire Official Sets Small Builds Town Town Sets

6643: Fire Truck

July 2, 2024July 2, 2024 Master Builder

Castle Castle Sets Official Sets Royal Knights Very Small Builds

1752: Boat with Armor

April 10, 2023April 10, 2023 Master Builder

Extra Large Builds Official Sets Technic Technic Sets

857: Motorcycle

January 6, 2025January 6, 2025 Master Builder

Box Story Extra Large Builds Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets

6285: Black Seas Barracuda

August 3, 2023February 20, 2025 Master Builder

Classic Space Classic Space Sets Medium Builds Official Sets Space

6926: Mobile Recovery Vehicle

October 12, 2021October 12, 2021 Master Builder

ABCs Official Sets Race Town Town Sets Very Small Builds

6677: Motocross Racing

June 8, 2023July 31, 2023 Master Builder

Classic Town Medium Builds Official Sets Recreation Town Town Sets

1817: Sea Plane with Hut and Boat

January 12, 2022January 12, 2022 Master Builder

Duplo Duplo Sets Official Sets Playhouse Small Builds

2788: Katie’s Kitchen

July 10, 2024July 10, 2024 Master Builder

Large Builds Official Sets Technic Technic Sets

8064: Universal Motor Set 9V

February 8, 2024February 8, 2024 Master Builder

Extra Large Builds Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets

6286: Skull’s Eye Schooner

February 8, 2022July 29, 2023 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.