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

6901 – Back A

August 25, 2023March 14, 2025 Master Builder 4823 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

6834 – Back C

February 9, 2021November 3, 2021 Master Builder

6086 – Inside A

October 11, 2021October 28, 2021 Master Builder

6679 – Back C

December 28, 2021December 28, 2021 Master Builder

6395 – Back B

July 1, 2022July 1, 2022 Master Builder

6356 – Back B

March 16, 2022March 16, 2022 Master Builder

4480 – Back A

March 18, 2022March 18, 2022 Master Builder

EXPLORE MORE OFFICIAL SETS

ABCs Official Sets Small Builds Space UFO UFO Sets

6829: Radon Rover

August 4, 2020March 22, 2025 Master Builder

Year Released: 1997InstructionsBricklink *Alternate Build Connection: Alien Planet Cruiser II

Classic Space Classic Space Sets Large Builds Official Sets

6971: Inter-Galactic Command Base

September 12, 2019September 28, 2019 Master Builder

Exploriens Exploriens Sets Medium Builds Official Sets Space

6899: Nebula Outpost

January 25, 2022September 13, 2024 Master Builder

Airport Classic Town Medium Builds Official Sets Town Town Sets

1818: Aircraft and Ground Support Equipment and Vehicle

April 7, 2025April 7, 2025 Master Builder

Episode I Extra Large Builds Official Sets Star Wars Star Wars Sets Star Wars Technic Technic

8002: Destroyer Droid

August 17, 2023September 1, 2023 Master Builder

9V Medium Builds Official Sets Town Train Train Sets

4544: Car Transport Wagon with Car

September 18, 2026September 18, 2026 Master Builder

Airport Classic Town Medium Builds Official Sets Town Town Sets

6440: Jetport Fire Squad

December 29, 2021December 29, 2021 Master Builder

Classic Town Official Sets Race Town Town Sets Very Small Builds

1096: Race Buggy

July 26, 2020July 26, 2020 Master Builder

Dino Attack Large Builds Official Sets

7475: Fire Hammer vs. Mutant Lizards

April 27, 2023April 27, 2023 Master Builder

Episode III Large Builds Official Sets Star Wars Star Wars Sets

7260: Wookiee Catamaran

March 1, 2023March 1, 2023 Master Builder

9V Official Sets Small Builds Town Train Train Sets

4525: Road and Rail Repair

July 22, 2026July 22, 2026 Master Builder

Blacktron Blacktron Sets Bonus/Value Packs Castle Castle Sets Classic Town Forestmen Official Sets Small Builds Space Town Traffic

1675: Legoland Triple Pack

October 12, 2021October 12, 2021 Master Builder

Box Marketing Blurb Classic Town Extra Large Builds Official Sets Town Town Sets Traffic

6390: Main Street

February 10, 2023April 3, 2024 Master Builder

Episode III Official Sets Small Builds Star Wars Star Wars Sets

7255: General Grievous Chase

March 2, 2023March 2, 2023 Master Builder

Episode III Extra Large Builds Official Sets Star Wars Star Wars Sets

7261: Clone Turbo Tank

March 1, 2023March 1, 2023 Master Builder

Castle Castle Sets Daniel August Krentz Large Builds Lion Knights Official Sets

6067: Guarded Inn

February 9, 2021July 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
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.