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 Classic Town Race Town Town Alternate Builds Very Small Builds 

1821 – Back A

February 10, 2025February 10, 2025 Master Builder 3854 Views

From: 1821: Rally Racers
Name: TBD
Submitted by: USER
Instructions

  • ← 1821: Rally Racers
  • 1821 – Back B →

You May Also Like

6310: T-Road Plates

October 10, 2022May 5, 2025 Master Builder

1732 (1712): Crossbow Cart

August 19, 2024October 8, 2024 Master Builder

Book 7777 – Page 2-3

November 11, 2021November 11, 2021 Master Builder

6706 – Back B

October 10, 2023October 10, 2023 Master Builder

6927 – Back A

October 22, 2019October 22, 2019 Master Builder

801 – Instructions

December 17, 2025December 17, 2025 Master Builder

EXPLORE MORE OFFICIAL SETS

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

Year Released: 2003BricklinkInstructions

6893: Orion II Hyperspace
Futron Sets Futuron Medium Builds Official Sets 

6893: Orion II Hyperspace

September 25, 2019September 28, 2019 Master Builder
1853: Navigator
Box Plus Different Box Versions Medium Builds Official Sets Storage Container Time Cruisers Time Cruisers Sets 

1853: Navigator

March 18, 2025March 5, 2026 Master Builder
7314: Recon-Mech RP
Life on Mars Life on Mars Sets Medium Builds Official Sets Space 

7314: Recon-Mech RP

July 14, 2021July 14, 2021 Master Builder
6038: Wolfpack Renegades
Castle Castle Sets Official Sets Small Builds Wolfpack 

6038: Wolfpack Renegades

October 14, 2021October 14, 2021 Master Builder
6938: Scorpion Detector
Exploriens Exploriens Sets Medium Builds Official Sets 

6938: Scorpion Detector

March 21, 2023March 5, 2026 Master Builder
6931: FX-Star Patroller
ABCs Classic Space Classic Space Sets Medium Builds Official Sets Space 

6931: FX-Star Patroller

January 12, 2021March 20, 2025 Master Builder
6368: Jet Airliner
Airport Classic Town Medium Builds Official Sets Town Town Sets 

6368: Jet Airliner

January 21, 2021January 21, 2021 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
6347: Monorail Accessory Track
Classic Town Official Sets Supplemental Town 

6347: Monorail Accessory Track

August 27, 2023August 27, 2023 Master Builder
8000: Pit Droid
Large Builds Official Sets Technic Technic Sets 

8000: Pit Droid

September 11, 2023September 11, 2023 Master Builder
6190: Shark’s Crystal Cave
Aquashark Aquazone Aquazone Sets Large Builds Official Sets 

6190: Shark’s Crystal Cave

July 13, 2021January 20, 2022 Master Builder
4525: Road and Rail Repair
9V Official Sets Small Builds Town Train Train Sets 

4525: Road and Rail Repair

July 22, 2026July 22, 2026 Master Builder
857: Motorcycle
Extra Large Builds Official Sets Technic Technic Sets 

857: Motorcycle

January 6, 2025January 6, 2025 Master Builder
8956: Stone Chopper
Official Sets Power Miners Power Miners Sets Small Builds 

8956: Stone Chopper

March 27, 2026March 27, 2026 Master Builder
924 (487): Space Cruiser
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

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.