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 Aquazone Aquazone Sets Hydronauts Official Sets Small Builds

6150 (6159): Crystal Detector

February 23, 2023February 18, 2025 Master Builder 6757 Views

Year Released: 1998
Bricklink
Instructions

*Alternate Build Connection: Aqua Rover (LEGO Mania Magazine: May-June 1998)

Back A

Back A

← 6905 – Back D
6150 – Back A →

You May Also Like

1526 – Back C

April 4, 2020March 14, 2025 Master Builder

6681 – Back D

October 13, 2021October 13, 2021 Master Builder

4501: Mos Eisley Cantina

December 29, 2021December 29, 2021 Master Builder

1817 – Back D

January 12, 2022January 12, 2022 Master Builder

6256 – Back A

June 6, 2022June 6, 2022 Master Builder

6932: Stardefender 200

September 24, 2019August 15, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

Bonus/Value Packs Futron Sets Futuron Official Sets Small Builds Space

1616: Space Combi-Pack

September 6, 2023September 6, 2023 Master Builder

Year Released: 1989BricklinkContains Sets: 1620: Astro Dart and 1621: Lunar MPV Vehicle

Exo-Force Medium Builds Official Sets

8114: Chameleon Hunter

December 12, 2025January 6, 2026 Master Builder

Construction LEGOLAND Medium Builds Official Sets

730: Steam Shovel with Carrier

February 21, 2024February 21, 2024 Master Builder

Classic Town Official Sets Police Town Town Sets Very Small Builds

6623: Police Car

October 13, 2021October 13, 2021 Master Builder

Airport Classic Town Large Builds Official Sets Town Town Sets

6346: Shuttle Launching Crew

November 20, 2020August 10, 2026 Master Builder

Classic Town Harbor Official Sets Town Town Sets Very Small Builds Wrecker

1632: Motor Boat

July 25, 2024July 25, 2024 Master Builder

Classic Space Classic Space Sets Official Sets Space Very Small Builds

6807: Space Sledge with Astronaut and Robot

November 21, 2023November 21, 2023 Master Builder

Castle Castle Sets Classic Castle Official Sets Very Small Builds

6077: Knight’s Procession

July 13, 2021July 13, 2021 Master Builder

Extreme Team Official Sets Small Builds Town Town Sets

6580: Land Jet 7

June 25, 2025June 25, 2025 Master Builder

Classic Town Medium Builds Official Sets Recreation Town Town Sets

6359: Horse Trailer

October 8, 2024October 8, 2024 Master Builder

9V Medium Builds Official Sets Train Train Sets

4536: Blue Hopper Car

July 10, 2026July 10, 2026 Master Builder

Bonus/Value Pack Sets Castle Castle Sets Forestmen Official Sets Small Builds

1974-3: Smuggler’s Hayride

September 7, 2023September 8, 2023 Master Builder

Bonus/Value Packs Castle Castle Sets Dragon Knights Imperial Guards Official Sets Pirates Pirates I Pirates Sets Small Builds

1723: Castle / Pirates Combi Pack

March 30, 2026March 30, 2026 Master Builder

Classic Town Extra Large Builds Gas Station Official Sets Town Town Sets Wrecker

6394: Metro Park & Service Tower

February 17, 2023February 17, 2023 Master Builder

Extra Large Builds Official Sets Star Wars Star Wars Sets

7190: Millennium Falcon

November 14, 2019November 14, 2019 Master Builder

ABCs Bjarne Tveskov Extra Large Builds Futron Sets Futuron Official Sets Space

6990: Futuron Monorail Transport System

August 30, 2020February 12, 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.