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

Different Set Numbers

Classic Space Classic Space Sets Different Box Versions Different Set Numbers Jens Nygaard Knudsen LL Link Medium Builds Official Sets Space 

924 (487): Space Cruiser

January 25, 2022October 17, 2024 Master Builder 7508 Views

Year Released: 1979Designer: Jens Nygaard KnudsenBricklinkInstructions BOX NOTE – This set has a different bottom with alternates on the rest of

Read more
ABCs Classic Space Classic Space Sets Different Box Versions Different Set Numbers Jens Nygaard Knudsen Large Builds LL Link Official Sets Space 

928 (497): Galaxy Explorer

November 24, 2020August 15, 2024 Master Builder 12347 Views

Year Released: 1979Designer: Jens Nygaard KnudsenBricklinkInstructions BOX NOTE – This set has a different bottom with alternates on the rest of

Read more
ABCs Castle Castle Sets Classic Castle Daniel August Krentz Different Set Numbers Duplicate Set Number Extra Large Builds Official Sets 

375-2 (6075-2): Castle

November 8, 2019September 5, 2025 Master Builder 8994 Views

Year Released: 1978Designer: Daniel August KrentzBricklinkInstructions *Alternate Build Connection: Book 6000 – Page 80-81

Read more

EXPLORE MORE OFFICIAL SETS

6503: Sprint Racer
Official Sets Race Town Town Sets Very Small Builds 

6503: Sprint Racer

July 9, 2022July 9, 2022 Master Builder

Year Released: 1988BricklinkInstructions

5870: Pretty Playland
Belville Belville Sets Official Sets Playhouse Small Builds 

5870: Pretty Playland

March 2, 2023March 2, 2023 Master Builder
889: Radar Truck
Classic Space Classic Space Sets Official Sets Very Small Builds 

889: Radar Truck

September 22, 2019September 28, 2019 Master Builder
1687: Midnight Transport
Airport Classic Town Large Builds Official Sets Town Town Sets 

1687: Midnight Transport

January 25, 2022January 25, 2022 Master Builder
Kabaya: Alpha Team 3
Alpha Team Alpha Team Sets Mission Deep Sea Official Sets Very Small Builds 

Kabaya: Alpha Team 3

September 9, 2024September 9, 2024 Master Builder
7204: Jedi Defense II
Episode I Official Sets Star Wars Star Wars Sets Very Small Builds 

7204: Jedi Defense II

June 27, 2022June 27, 2022 Master Builder
4719: Quality Quidditch Supplies
Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets 

4719: Quality Quidditch Supplies

March 22, 2025March 22, 2025 Master Builder
1761: Paradisa Speedboat
Official Sets Paradisa Town Town Sets Very Small Builds 

1761: Paradisa Speedboat

April 10, 2023April 10, 2023 Master Builder
7184: Trade Federation MTT
Episode IV/V/VI Extra Large Builds Official Sets Star Wars Star Wars Sets 

7184: Trade Federation MTT

April 21, 2026April 21, 2026 Master Builder
6716: Weapons Wagon
Cowboys Jørn Thomsen Official Sets Small Builds Western Western Sets 

6716: Weapons Wagon

April 2, 2022July 29, 2023 Master Builder
6398: Central Precinct HQ
Box Story Classic Town Extra Large Builds Official Sets Police Town Town Sets 

6398: Central Precinct HQ

February 19, 2025February 19, 2025 Master Builder
6804: Surface Rover
Classic Space Classic Space Sets Official Sets Very Small Builds 

6804: Surface Rover

September 25, 2019September 28, 2019 Master Builder
4704: The Chamber of the Winged Keys
Harry Potter Harry Potter Sets Medium Builds Official Sets Sorcerer's Stone 

4704: The Chamber of the Winged Keys

May 28, 2024May 28, 2024 Master Builder
1381: Vampire’s Crypt
Medium Builds Official Sets Studio Sets Studios 

1381: Vampire’s Crypt

July 2, 2024July 2, 2024 Master Builder
894: Mobile Ground Tracking Station
Classic Space Classic Space Sets Jens Nygaard Knudsen Official Sets Small Builds Space 

894: Mobile Ground Tracking Station

January 12, 2021July 29, 2023 Master Builder
7134: A-wing Fighter
Episode IV/V/VI Medium Builds Official Sets Star Wars Star Wars Sets 

7134: A-wing Fighter

December 29, 2021December 29, 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
  • 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.