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 C

August 28, 2023March 14, 2025 Master Builder 4501 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

7166 – Back A

April 16, 2021April 16, 2021 Master Builder

6698 – Back D

June 16, 2022June 28, 2022 Master Builder

6939 – Back B

February 5, 2023February 13, 2023 Master Builder

2532 – Back B

December 28, 2021December 28, 2021 Master Builder

6933 – Back A

May 18, 2022May 23, 2022 Master Builder

194 – Back B

October 4, 2019November 18, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

Box Story Classic Town Extra Large Builds Official Sets Police Town Town Sets

6398: Central Precinct HQ

February 19, 2025February 19, 2025 Master Builder

Year Released: 1993BricklinkInstructions The box reads, “The emergency call goes out, but who will be the first to respond? With building sets

Aquazone Aquazone Sets Large Builds Official Sets Stingrays

6198: Stingray Stormer

October 29, 2019April 4, 2020 Master Builder

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

6376: Breezeway Cafe

February 3, 2021February 3, 2021 Master Builder

Medium Builds Official Sets Res-Q Town Town Sets

6462: Res-Q Helicopter

July 10, 2026July 10, 2026 Master Builder

Classic Space Classic Space Sets Official Sets Space Very Small Builds

6802: Space Probe

October 10, 2022October 10, 2022 Master Builder

Medium Builds Official Sets Time Cruisers Time Cruisers Sets

6496: Whirling Time Warper

March 18, 2025March 18, 2025 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds Space

6870: Space Probe Launcher

January 12, 2021January 12, 2021 Master Builder

Extra Large Builds Official Sets Studio Sets Studios

1382: Scary Laboratory

August 10, 2026August 10, 2026 Master Builder

Alpha Team Alpha Team Sets Mission Deep Sea Official Sets Very Small Builds

Kabaya: Alpha Team 1

September 9, 2024September 9, 2024 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

Airport Classic Town Official Sets Race Small Builds Super Model Town

Super Stunt Machine

March 8, 2025March 10, 2025 Master Builder

Classic Space Classic Space Sets Official Sets Very Small Builds

6803: Space Patrol

September 21, 2019February 15, 2026 Master Builder

Classic Town Official Sets Small Builds Town Town Sets Traffic

6649: Street Sweeper

July 8, 2022July 8, 2022 Master Builder

ABCs Insectoids Insectoids Sets Official Sets Small Builds Space

6907: Sonic Stinger

October 3, 2024March 22, 2025 Master Builder

Harry Potter Harry Potter Sets Official Sets Small Builds Sorcerer's Stone

4702: The Final Challenge

August 8, 2024August 8, 2024 Master Builder

ABCs Jørn Thomsen Medium Builds Official Sets Space Space Police II Space Police II Sets

6897: Rebel Hunter

January 23, 2022February 11, 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.