Skip to content
Back of the Box Builds

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
    • Submit Instructions!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP
Alternate Builds Aquanauts Aquazone Aquazone Alternate Builds Very Small Builds 

6125 – Back C

April 9, 2020April 9, 2020 Master Builder 4064 Views

From: 6125: Sea Sprint 9
Name: TBD
Submitted by: USER
Instructions:

  • ← 6125 – Back B
  • 1787: Crater Cruiser →

You May Also Like

6043 – Back B

November 20, 2023November 21, 2023 Master Builder

194 – Instructions A

October 6, 2019November 18, 2021 Master Builder

565 – Back D

December 28, 2023July 11, 2024 Master Builder

6849 – Back A

January 13, 2021January 13, 2021 Master Builder

6882 – Back A

September 30, 2019November 18, 2021 Master Builder

6761 – Back C

December 29, 2021December 29, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

885: Space Scooter
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

885: Space Scooter

January 27, 2024May 13, 2026 Master Builder

Year Released: 1979BricklinkInstructions

6345: Aerial Acrobats
Airport Classic Town Large Builds Official Sets Town Town Sets 

6345: Aerial Acrobats

January 29, 2021September 15, 2022 Master Builder
6539: Victory Cup Racers
Extra Large Builds Official Sets Race Town Town Sets 

6539: Victory Cup Racers

October 26, 2026October 26, 2026 Master Builder
7256: Jedi Starfighter & Vulture Droid
Episode III Medium Builds Official Sets Star Wars Star Wars Sets 

7256: Jedi Starfighter & Vulture Droid

March 1, 2023May 12, 2023 Master Builder
7043: Firefighter
Fire Official Sets Small Builds Town Town Sets World City 

7043: Firefighter

January 22, 2024January 22, 2024 Master Builder
1877: Crusader’s Cart
Bonus/Value Pack Sets Castle Castle Sets Forestmen Official Sets Small Builds 

1877: Crusader’s Cart

October 11, 2021September 24, 2024 Master Builder
510: Basic Building Set
Basic Official Sets Small Builds Universal Building Set 

510: Basic Building Set

July 11, 2024July 11, 2024 Master Builder
6941: Battrax
Blacktron Blacktron Sets Box Marketing Blurb Large Builds Official Sets 

6941: Battrax

September 13, 2019March 28, 2026 Master Builder
7101: Lightsaber Duel
Episode I Official Sets Small Builds Star Wars Star Wars Sets 

7101: Lightsaber Duel

October 28, 2021October 28, 2021 Master Builder
6074: Black Falcon’s Fortress
Black Falcons Castle Castle Sets Daniel August Krentz Large Builds Official Sets 

6074: Black Falcon’s Fortress

October 14, 2021July 29, 2023 Master Builder
846: Lighting Bricks
Basic Basic Alternate Builds Basic Set Classic Town Official Sets Supplemental Town 

846: Lighting Bricks

October 26, 2026October 26, 2026 Master Builder
7411: Tygurah’s Roar
Adventurers Adventurers Sets Box Story Official Sets Orient Expedition Small Builds 

7411: Tygurah’s Roar

December 16, 2025December 16, 2025 Master Builder
6821: Shovel Buggy (Geological Inspection)
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

6821: Shovel Buggy (Geological Inspection)

February 17, 2026February 17, 2026 Master Builder
6419: Rolling Acres Ranch
Large Builds Official Sets Paradisa Town Town Sets 

6419: Rolling Acres Ranch

August 10, 2026August 10, 2026 Master Builder
7143: Jedi Starfighter
Episode II Medium Builds Official Sets Star Wars Star Wars Sets 

7143: Jedi Starfighter

December 29, 2021December 29, 2021 Master Builder
4709: Hogwarts Castle
Extra Large Builds Harry Potter Harry Potter Sets Official Sets Sorcerer's Stone 

4709: Hogwarts Castle

April 16, 2021July 13, 2021 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

Logo
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.