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
    • 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 Small Builds 

1728 (6145) – Back B

August 1, 2023August 1, 2023 Master Builder 4023 Views

From: 1728 (6145): Crystal Crawler {with Aqua Playscape}
Name: TBD
Submitted by: USER
Instructions:

  • ← 1728 (6145) – Back A
  • 1728 (6145) – Back C →

You May Also Like

4726 – Back B

February 27, 2023February 27, 2023 Master Builder

3056 – Side R

July 26, 2020July 26, 2020 Master Builder

6195: Neptune Discovery Lab (Aqua Dome 7)

January 20, 2022February 11, 2025 Master Builder

6989 – Back B

March 22, 2023June 5, 2024 Master Builder

6335 – Back A

November 29, 2023November 29, 2023 Master Builder

6970 – Back C

January 20, 2021October 25, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

6071: Forestmen’s Crossing
Box Marketing Blurb Castle Castle Sets Forestmen Medium Builds Official Sets 

6071: Forestmen’s Crossing

October 23, 2019April 3, 2024 Master Builder

Year Released: 1990BricklinkInstructions The box reads, “Creativity and Quality Craftsmanship are the key ingredients in this and all LEGO® brand building

4504: Millennium Falcon (Redesign)
Episode IV/V/VI Extra Large Builds Official Sets Star Wars Star Wars Sets 

4504: Millennium Falcon (Redesign)

May 15, 2023May 15, 2023 Master Builder
6609: Race Car
Official Sets Race Town Town Sets Very Small Builds 

6609: Race Car

February 12, 2024February 12, 2024 Master Builder
6274: Caribbean Clipper
Box Story Imperial Soldiers Large Builds Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets 

6274: Caribbean Clipper

February 8, 2022February 21, 2025 Master Builder
1476: 5 Set Bonus Pack
Bonus/Value Pack Sets Bonus/Value Packs Official Sets Small Builds 

1476: 5 Set Bonus Pack

July 22, 2024October 2, 2024 Master Builder
6894: Invader
Blacktron Blacktron Sets Medium Builds Official Sets 

6894: Invader

November 20, 2019November 20, 2019 Master Builder
6739: Truck & Stunt Trikes
Island Xtreme Stunts Island Xtreme Stunts Sets Medium Builds Official Sets 

6739: Truck & Stunt Trikes

April 16, 2026April 16, 2026 Master Builder
6083-2: Samurai Stronghold
Box Story Duplicate Set Number Medium Builds Ninja Ninja Alternate Builds Ninja Official Sets Official Sets 

6083-2: Samurai Stronghold

December 16, 2025December 16, 2025 Master Builder
535: Basic Building Set Tote Pack
Basic Large Builds Official Sets Universal Building Set 

535: Basic Building Set Tote Pack

May 15, 2023May 16, 2023 Master Builder
1723: Castle / Pirates Combi Pack
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
6391: Cargo Center
Cargo Classic Town Extra Large Builds Official Sets Town Town Sets 

6391: Cargo Center

March 13, 2024March 13, 2024 Master Builder
6667: Pothole Patcher
Classic Town Official Sets Small Builds Town Town Sets Traffic 

6667: Pothole Patcher

November 19, 2020November 19, 2020 Master Builder
7782: The Batwing: Joker’s Aerial Assault
Batman I BATMAN™ BATMAN™ Sets Large Builds Official Sets 

7782: The Batwing: Joker’s Aerial Assault

March 27, 2026March 27, 2026 Master Builder
6440: Jetport Fire Squad
Airport Classic Town Medium Builds Official Sets Town Town Sets 

6440: Jetport Fire Squad

December 29, 2021December 29, 2021 Master Builder
4480: Jabba’s Palace
Episode IV/V/VI Medium Builds Official Sets Star Wars Star Wars Sets 

4480: Jabba’s Palace

March 18, 2022March 18, 2022 Master Builder
6581: Dig N’ Dump
Classic Town Construction Medium Builds Official Sets Town Town Sets 

6581: Dig N’ Dump

November 7, 2022November 7, 2022 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
  • 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.