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

ABCs Classic Space Classic Space Sets Large Builds Official Sets Space

6783: Sonar Transmitting Cruiser

May 8, 2022August 15, 2023 Master Builder 6873 Views

Year Released: 1986
Bricklink
Instructions

*Alternate Build Connection: BrickJournal Issue 6 Volume 2 Page 39 – Proto 1

Back A

Back A

← 6641: 4-Wheelin’ Truck (Four Wheelin’ Truck)
6783 – Back A →

You May Also Like

6251: Pirate Mini Figures (Sea Mates)

April 9, 2020April 9, 2020 Master Builder

6899: Nebula Outpost

January 25, 2022September 13, 2024 Master Builder

6954: Renegade

September 7, 2020October 16, 2024 Master Builder

6803 – Back A

September 21, 2019February 15, 2026 Master Builder

6073 – Back C

October 23, 2019October 23, 2019 Master Builder

7150: TIE Fighter & Y-wing

April 21, 2026April 21, 2026 Master Builder

EXPLORE MORE OFFICIAL SETS

Exo-Force Medium Builds Official Sets

7704: Sonic Phantom

April 28, 2023April 28, 2023 Master Builder

Year Released: 2006BricklinkInstructions

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

6683: Burger Stand

May 1, 2024May 1, 2024 Master Builder

2 in 1 Medium Builds Official Sets Technic Technic Sets

42089: Power Boat

August 28, 2026August 28, 2026 Master Builder

Castle Castle Sets Dragon Knights Medium Builds Official Sets

6048: Majisto’s Magical Workshop

October 14, 2021October 14, 2021 Master Builder

Bonus/Value Pack Sets Castle Castle Sets Official Sets Royal Knights Small Builds

1843-3: {Royal Knights Unknown}

September 8, 2023September 13, 2023 Master Builder

Chamber of Secrets Extra Large Builds Harry Potter Harry Potter Sets Official Sets

4730: The Chamber of Secrets

January 23, 2024January 23, 2024 Master Builder

Castle Castle Sets Official Sets Small Builds Wolfpack

6038: Wolfpack Renegades

October 14, 2021October 14, 2021 Master Builder

Castle Castle Sets Fright Knights Official Sets Small Builds

6037: Witch’s Windship

December 29, 2021December 29, 2021 Master Builder

Black Falcons Castle Castle Sets Official Sets Small Builds

6030: Catapult

April 2, 2022April 2, 2022 Master Builder

Black Falcons Castle Castle Sets Daniel August Krentz Large Builds Official Sets

6074: Black Falcon’s Fortress

October 14, 2021July 29, 2023 Master Builder

Castle Castle Sets Official Sets Royal Knights Small Builds

6036: Skeleton Surprise

February 28, 2023February 28, 2023 Master Builder

Classic Town Official Sets Small Builds Town Town Sets Wrecker

6670: Rescue Rig

November 19, 2020November 19, 2020 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds Space

6880: Surface Explorer

May 4, 2020May 4, 2020 Master Builder

9V Extra Large Builds Official Sets Town Train Train Sets

4558: Metroliner

August 11, 2026August 11, 2026 Master Builder

ABCs Insectoids Insectoids Sets Official Sets Space Very Small Builds

6817: Beta Buzzer

June 1, 2022March 22, 2025 Master Builder

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

1620-2: Factory

October 21, 2021October 21, 2021 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.