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 4270 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

6660 – Back A

June 23, 2025June 23, 2025 Master Builder

6529 – Back A

April 11, 2023May 17, 2023 Master Builder

1906: Majisto’s Tower

August 1, 2023October 8, 2024 Master Builder

6076 – Back C

January 30, 2024February 6, 2024 Master Builder

6926 – Back D

October 12, 2021October 12, 2021 Master Builder

379 – Back C

April 10, 2021April 10, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

Large Builds Official Sets Res-Q Town Town Sets

6473: Res-Q Hovercraft

January 20, 2022January 20, 2022 Master Builder

Year Released: 1998BricklinkInstructions

ABCs Jørn Thomsen Medium Builds Official Sets Space Spyrius Spyrius Sets

6889: Recon Robot

October 24, 2019September 9, 2024 Master Builder

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

7186: Watto’s Junkyard

April 21, 2026April 21, 2026 Master Builder

Battle Vehicles BIONICLE BIONICLE Sets Extra Large Builds Official Sets

8942: Jetrax T6

March 4, 2026March 4, 2026 Master Builder

Episode IV/V/VI Medium Builds Official Sets Star Wars Star Wars Sets

7130: Snowspeeder

June 28, 2022June 28, 2022 Master Builder

Large Builds Official Sets Time Cruisers Time Cruisers Sets

6493: Flying Time Vessel

July 14, 2021December 29, 2021 Master Builder

Aquashark Aquazone Aquazone Sets Official Sets Small Builds

6155: Deep Sea Predator

May 10, 2022May 10, 2022 Master Builder

Box Story Large Builds Official Sets Pirates Pirates I Pirates Sets

6273: Rock Island Refuge

July 4, 2024July 4, 2024 Master Builder

Bonus/Value Pack Sets Futron Sets Futuron Jørn Thomsen Official Sets Small Builds Space

1621: Lunar MPV Vehicle

September 6, 2023September 7, 2023 Master Builder

Castle Castle Sets Fright Knights Medium Builds Official Sets

6047: Traitor Transport

November 18, 2021November 18, 2021 Master Builder

Castle Castle Sets Fright Knights Official Sets Small Builds

6027: Bat Lord’s Catapult

January 28, 2022January 28, 2022 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds Space

6870: Space Probe Launcher

January 12, 2021January 12, 2021 Master Builder

Box Plus FreeStyle FreeStyle Official Sets Official Sets Poster Small Builds

4150: FreeStyle Building Set

December 17, 2025December 17, 2025 Master Builder

Classic Town Food and Drink Medium Builds Official Sets Town Town Sets

6350: Pizza To Go

April 9, 2020February 3, 2021 Master Builder

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

7302 (1416, Kabaya: Life On Mars 2): Worker Robot

February 25, 2025February 25, 2025 Master Builder

Large Builds Official Sets Space UFO UFO Sets

6975: Alien Avenger

November 9, 2019July 21, 2025 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.