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 C

August 28, 2023March 14, 2025 Master Builder 3250 Views

From: 6901: Mobile Lab
Name: Convertible Cruiser Mobile Lab ¹
Instructions: View PDF | Download .io File

Contributions

Name, PDF and .io file submitted August 28, 2023 by: Mr.AstonishedRaccoon

← 854: Go-Kart
6901 – Back D →

You May Also Like

6043 – Back A

November 20, 2023November 21, 2023 Master Builder

1484 – Back D

December 28, 2021December 28, 2021 Master Builder

Anti-Kipper Ballistic Missile

April 16, 2025April 16, 2025 Master Builder

6336 – Back D

July 12, 2021July 12, 2021 Master Builder

6871: Star Patrol Launcher

September 27, 2019September 30, 2019 Master Builder

10182 – Back B

January 23, 2024January 28, 2025 Master Builder

EXPLORE MORE OFFICIAL SETS

Official Sets Scala Scala Alternate Builds Scala Sets Small Builds

3152: Playroom for the Baby Thomas

July 10, 2024July 10, 2024 Master Builder

Year Released: 2000Bricklink

Blacktron Blacktron Sets Large Builds Official Sets

6941: Battrax

September 13, 2019September 28, 2019 Master Builder

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

4501: Mos Eisley Cantina

December 29, 2021December 29, 2021 Master Builder

Insectoids Insectoids Sets Large Builds Official Sets

6919: Planetary Prowler

November 9, 2019November 9, 2019 Master Builder

Castle Castle Sets Extra Large Builds Niels Milan Pedersen Official Sets Royal Knights

6090: Royal Knight’s Castle

July 13, 2021July 29, 2023 Master Builder

Official Sets Small Builds Star Wars Star Wars Sets

7115: Gungan Patrol

January 12, 2021January 12, 2021 Master Builder

Classic Space Classic Space Sets Jens Nygaard Knudsen Medium Builds Official Sets Space

926 (493): Space Command Center

October 22, 2019July 31, 2023 Master Builder

Basic Extra Large Builds Official Sets Universal Building Set

725: Basic Building Set

July 22, 2024July 22, 2024 Master Builder

ABCs Large Builds Official Sets Space Spyrius Spyrius Sets

6949: Robo-Guardian

October 23, 2019August 15, 2023 Master Builder

Box Story Imperial Guards Large Builds Official Sets Pirates Pirates I Pirates Sets

6271: Imperial Flagship

January 6, 2022February 20, 2025 Master Builder

Alpha Team Alpha Team Sets Medium Builds Mission Deep Sea Official Sets

4794: Alpha Team Command Sub

February 12, 2024February 21, 2024 Master Builder

Aquaraiders I Aquazone Aquazone Sets Medium Builds Official Sets

2160: Crystal Scavenger

April 25, 2023April 25, 2023 Master Builder

Official Sets Small Builds Space Spyrius Spyrius Sets Unitron Unitron Sets

1785: Introducing Crater Critters

December 28, 2021December 28, 2021 Master Builder

Jørn Thomsen Official Sets Space Spyrius Spyrius Sets Very Small Builds

1954 (1714, Kabaya: Space 1): Surveillance Scooter

January 26, 2022February 25, 2025 Master Builder

Exo-Force Official Sets Small Builds

7711: Sentry

August 11, 2023August 11, 2023 Master Builder

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

1730: Snow Scooter

April 11, 2023April 11, 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 © 2025 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.