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

Jim Spaceborn

Classic Space Classic Space Alternate Builds Comic Book Jim Spaceborn Space 

Swamp Rover

March 28, 2026March 28, 2026 Master Builder 4419 Views

Name: Swamp RoverSubmitted By: USERInstructions: Jim Spaceborn: The Kidnappers From Swamp Planet

Read more
Alternate Instructions Included Classic Space Classic Space Alternate Builds Comic Book Instructions Added Jim Spaceborn Space 

Viva’s Space Scooter

March 28, 2026March 28, 2026 Master Builder 4500 Views

Name: Viva’s Space ScooterInstructions: Included on Page Jim Spaceborn: The Kidnappers From Swamp Planet – Page 47

Read more
ABCs Alternate Builds Classic Space Classic Space Alternate Builds Comic Book Instructions Added Jim Spaceborn Small Alt Build Small Builds Space 

6847 – Comic

September 14, 2025March 28, 2026 Master Builder 4037 Views

Name: Dozer Instructions: View PDF | Download .io File *Alternate Build Connection: 6847: Space Dozer, Keko’s Uncle Jim Spaceborn: The Unknown Galaxy – Page

Read more
Classic Space Classic Space Alternate Builds Comic Book Instructions Added Jim Spaceborn Medium Alt Build Medium Builds Space 

Pathfinder

April 14, 2025April 29, 2025 Master Builder 5074 Views

MiscName: Pathfinder Instructions: View PDF | Download .io File Jim Spaceborn: The Unknown Galaxy

Read more
Classic Space Classic Space Alternate Builds Comic Book Jim Spaceborn Space 

Galactic Spearhead

April 9, 2025April 10, 2025 Master Builder 4840 Views

MiscName: Galactic SpearheadSubmitted by: USERInstructions: 1984 LEGOLAND Book Trapped in Space by Douglas Hill

Read more
Classic Space Classic Space Alternate Builds Comic Book Instructions Added Jim Spaceborn Space 

Keko’s Family

March 14, 2025March 28, 2026 Master Builder 4553 Views

MiscFrom: The Unknown Galaxy Jim Spaceborn: The Unknown Galaxy – Page 55 Name: KekoSubmitted by: USERInstructions: Name: Keko’s CousinSubmitted by: USERInstructions: Name:

Read more
Classic Space Classic Space Alternate Builds Comic Book Jim Spaceborn Space 

L-Sie

March 14, 2025March 28, 2026 Master Builder 4782 Views

Name: L-SieSubmitted by: USERInstructions: Jim Spaceborn: The Unknown Galaxy – Page 38

Read more
Classic Space Classic Space Alternate Builds Comic Book Jim Spaceborn Space 

MAGS

March 14, 2025April 10, 2025 Master Builder 5006 Views

MiscName: MAGSSubmitted by: USERInstructions: Jim Spaceborn: The Unknown Galaxy

Read more
Blacktron Blacktron Alternate Builds Classic Space Classic Space Alternate Builds Comic Book Jim Spaceborn Space 

Robus

March 14, 2025April 10, 2025 Master Builder 4391 Views

MiscName: RobusSubmitted by: USERInstructions: Jim Spaceborn: The Unknown Galaxy

Read more
Classic Space Classic Space Alternate Builds Comic Book Jim Spaceborn Space 

Spearhead

March 14, 2025April 10, 2025 Master Builder 4732 Views

MiscName: SpearheadSubmitted by: USERInstructions: Jim Spaceborn: The Unknown Galaxy – Page 54

Read more

EXPLORE MORE OFFICIAL SETS

7725: Electric Passenger Train
12V Large Builds Official Sets Town Train Train Sets 

7725: Electric Passenger Train

December 29, 2021July 26, 2022 Master Builder

Year Released: 1981BricklinkInstructions

1761: Paradisa Speedboat
Official Sets Paradisa Town Town Sets Very Small Builds 

1761: Paradisa Speedboat

April 10, 2023April 10, 2023 Master Builder
6879: Blizzard Baron
Ice Planet 2002 Ice Planet 2002 Sets Official Sets Small Builds Space 

6879: Blizzard Baron

November 20, 2019July 29, 2023 Master Builder
6347: Monorail Accessory Track
Classic Town Official Sets Supplemental Town 

6347: Monorail Accessory Track

August 27, 2023August 27, 2023 Master Builder
6801: Moon Buggy
Classic Space Classic Space Sets Official Sets Very Small Builds 

6801: Moon Buggy

September 22, 2019September 28, 2019 Master Builder
3152: Playroom for the Baby Thomas
Official Sets Scala Scala Alternate Builds Scala Sets Small Builds 

3152: Playroom for the Baby Thomas

July 10, 2024July 10, 2024 Master Builder
7783: The Batcave: The Penguin and Mr. Freeze’s Invasion
Batman I BATMAN™ BATMAN™ Sets Extra Large Builds Official Sets 

7783: The Batcave: The Penguin and Mr. Freeze’s Invasion

March 27, 2026March 27, 2026 Master Builder
7310: Mono Jet
Life on Mars Life on Mars Sets Official Sets Very Small Builds 

7310: Mono Jet

April 16, 2021April 16, 2021 Master Builder
6542: Launch & Load Seaport
Classic Town Extra Large Builds Harbor Official Sets Town Town Sets Wrecker 

6542: Launch & Load Seaport

August 1, 2022August 1, 2022 Master Builder
1747: Treasure Cave
Official Sets Pirates Pirates I Pirates Sets Very Small Builds 

1747: Treasure Cave

May 6, 2022May 6, 2022 Master Builder
6899: Nebula Outpost
Exploriens Exploriens Sets Medium Builds Official Sets Space 

6899: Nebula Outpost

January 25, 2022September 13, 2024 Master Builder
1818: Aircraft and Ground Support Equipment and Vehicle
Airport Classic Town Medium Builds Official Sets Town Town Sets 

1818: Aircraft and Ground Support Equipment and Vehicle

April 7, 2025April 7, 2025 Master Builder
1675: Legoland Triple Pack
Blacktron Blacktron Sets Bonus/Value Packs Castle Castle Sets Classic Town Forestmen Official Sets Small Builds Space Town Traffic 

1675: Legoland Triple Pack

October 12, 2021October 12, 2021 Master Builder
4500: Rebel Snowspeeder
Episode II Episode IV/V/VI Medium Builds Official Sets Star Wars Star Wars Sets 

4500: Rebel Snowspeeder

April 9, 2020April 9, 2020 Master Builder
6847: Space Dozer
ABCs Classic Space Classic Space Sets Official Sets Small Builds Space 

6847: Space Dozer

January 29, 2025April 10, 2025 Master Builder
6648: Mag Racer
Classic Town LL Link Official Sets Race Small Builds Town Town Sets 

6648: Mag Racer

November 19, 2020July 11, 2024 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.