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
Airport Alternate Builds Classic Town Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6673 – Back D

April 20, 2025April 21, 2025 Master Builder 3755 Views

From: 6673: Solo Trainer
Name: Boat Trainer 1
Instructions: View PDF

Back D

Contributions

  1. Name and PDF submitted on April 20, 2025 by: KILDET
  • ← 6673 – Back C
  • 5935: Island Hopper →

You May Also Like

6271 – Back D

January 6, 2022February 20, 2025 Master Builder

7133 – Back A

July 14, 2021July 14, 2021 Master Builder

5988 – Back A

October 29, 2019April 4, 2020 Master Builder

6368 – Back B

January 21, 2021January 21, 2021 Master Builder

6623 – Back B

October 13, 2021October 13, 2021 Master Builder

375-1 – Back G

September 11, 2023September 11, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

6882: Walking Astro Grappler
Classic Space Classic Space Sets Mads Rye Official Sets Small Builds 

6882: Walking Astro Grappler

September 30, 2019April 2, 2025 Master Builder

Year Released: 1985Designer: Mads RyeBricklinkInstructions *Alternate Build Connection: 6876: Alienator, 6878: Sub Orbital Guardian

1968: {Unknown}
Classic Space Classic Space Sets Medium Builds Official Sets Space 

1968: {Unknown}

August 28, 2020September 13, 2023 Master Builder
7302 (1416, Kabaya: Life On Mars 2): Worker Robot
Life on Mars Life on Mars Sets Official Sets Very Small Builds 

7302 (1416, Kabaya: Life On Mars 2): Worker Robot

February 25, 2025February 25, 2025 Master Builder
8593: Makuta
Alternate Instructions Included BIONICLE BIONICLE Sets Instructions Added Medium Alt Build Medium Builds Official Sets Titans 

8593: Makuta

April 23, 2026April 23, 2026 Master Builder
6769: Fort Legoredo
Extra Large Builds Jørn Thomsen Official Sets Western Western Sets 

6769: Fort Legoredo

November 10, 2019July 29, 2023 Master Builder
6258: Smuggler’s Shanty
Official Sets Pirates Pirates I Pirates Sets Small Builds 

6258: Smuggler’s Shanty

July 8, 2022July 8, 2022 Master Builder
8956: Stone Chopper
Official Sets Power Miners Power Miners Sets Small Builds 

8956: Stone Chopper

March 27, 2026March 27, 2026 Master Builder
6808: Galaxy Trekkor
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

6808: Galaxy Trekkor

January 21, 2021January 21, 2021 Master Builder
6590: Vacation Camper
Classic Town Official Sets Small Builds Town Town Sets Traffic 

6590: Vacation Camper

July 8, 2022July 8, 2022 Master Builder
6392: Airport
ABCs Airport Classic Town Extra Large Builds Official Sets Town Town Sets 

6392: Airport

June 28, 2022August 16, 2023 Master Builder
6830: Space Patroller
Bjarne Tveskov Futron Sets Futuron Official Sets Space Very Small Builds 

6830: Space Patroller

April 8, 2020July 29, 2023 Master Builder
6921: Monorail Accessory Track
Futuron Official Sets Space Supplemental 

6921: Monorail Accessory Track

September 1, 2023January 22, 2026 Master Builder
6831: Message Decoder
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
6355: Derby Trotter
Classic Town Medium Builds Official Sets Recreation Town Town Sets 

6355: Derby Trotter

December 28, 2021December 28, 2021 Master Builder
1963: Basic Set with Storage Case
Basic Box Plus Large Builds Official Sets Storage Container Universal Building Set 

1963: Basic Set with Storage Case

October 9, 2024October 9, 2024 Master Builder
6396: International Jetport
Airport Classic Town Extra Large Builds Official Sets Town Town Sets 

6396: International Jetport

July 14, 2021July 14, 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.