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
- Town
- Universal Building Set
- Western
- More Sets
- Misc
USEFUL LINKS
THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Bjarne Tveskov Official Sets Space Space Police I Space Police I Sets Very Small Builds

6831: Message Decoder

May 3, 2020July 29, 2023 Master Builder 5502 Views

Year Released: 1989
Designer: Bjarne Tveskov
Instructions
Bricklink

Back A

Back A

← 918 – Back D
6831 – Back A →

You May Also Like

1752: Boat with Armor

April 10, 2023April 10, 2023 Master Builder

1616 – Back A

September 6, 2023September 7, 2023 Master Builder

7190: Millennium Falcon

November 14, 2019November 14, 2019 Master Builder

6886 – Back C

March 29, 2022April 5, 2022 Master Builder

6034 – Back C

January 16, 2022January 16, 2022 Master Builder

918 – Back A

June 25, 2025June 26, 2025 Master Builder

EXPLORE MORE OFFICIAL SETS

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

6260: Shipwreck Island

April 9, 2020July 29, 2023 Master Builder

Year Released: 1989Designer: Niels Milan PedersenBricklinkInstructions

ABCs Exploriens Exploriens Sets Official Sets Small Builds Space

6854: Alien Fossilizer

July 15, 2022March 22, 2025 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

Official Sets Race Town Town Sets Very Small Builds

6510: Mud Runner

May 8, 2022May 8, 2022 Master Builder

Insectoids Insectoids Sets Official Sets Small Builds

6905: Bi-Wing Blaster

February 22, 2023February 22, 2023 Master Builder

Official Sets Racers Radio Control Small Builds

8675: Outdoor Challenger

July 15, 2024July 15, 2024 Master Builder

Classic Town Medium Builds Official Sets Town Town Sets Traffic

379: Bus Station

April 10, 2021May 31, 2023 Master Builder

Box Marketing Blurb Large Builds Official Sets Samsonite Samsonite Sets

375: Deluxe Basic Set

September 11, 2023April 3, 2024 Master Builder

Fire Official Sets Small Builds Town Town Sets World City

7043: Firefighter

January 22, 2024January 22, 2024 Master Builder

Castle Castle Sets Lion Knights Official Sets Small Builds

6040: Blacksmith Shop

October 8, 2023October 8, 2023 Master Builder

Classic Space Classic Space Sets Official Sets Space Very Small Builds

6806: Surface Hopper

April 16, 2021April 16, 2021 Master Builder

Box Marketing Blurb Extra Large Builds Jørn Thomsen M:Tron M:Tron Sets Official Sets

6989: Mega Core Magnetizer (Multi Core Magentizer)

September 15, 2019February 18, 2026 Master Builder

Extra Large Builds Goblet of Fire Harry Potter Harry Potter Sets Official Sets

4768: The Durmstrang Ship

May 16, 2023May 16, 2023 Master Builder

Classic Space Classic Space Sets Official Sets Space Very Small Builds

6821: Shovel Buggy (Geological Inspection)

February 17, 2026February 17, 2026 Master Builder

Bjarne Tveskov Futron Sets Futuron Official Sets Space Very Small Builds

6830: Space Patroller

April 8, 2020July 29, 2023 Master Builder

Box Marketing Blurb Large Builds Official Sets Space Space Police I Space Police I Sets

6955: Space Lock-Up Isolation Base

February 3, 2021April 3, 2024 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
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.