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
Classic Space Classic Space Sets Jens Nygaard Knudsen Medium Builds Official Sets Space 

920 (483): Alpha-1 Rocket Base

February 2, 2021July 31, 2023 Master Builder 9008 Views

Year Released: 1979
Designer: Jens Nygaard Knudsen
Bricklink
Instructions

Back A
Back B
Back C
Back D
Back E
Back F
Back G
  • ← 2586 – Back A
  • 920 – Back A →

You May Also Like

6970 – Back F

January 20, 2021October 25, 2021 Master Builder

379 – Back C

April 10, 2021April 10, 2021 Master Builder

Invention Adventure Activity Book – Page 25-26

April 28, 2024May 10, 2024 Master Builder

6419: Rolling Acres Ranch

August 10, 2026August 10, 2026 Master Builder

6296 – Back B

January 12, 2022January 12, 2022 Master Builder

6831 – Back A

May 3, 2020November 18, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

6660: Hook and Haul Wrecker
Classic Town Off-Road Official Sets Small Builds Town Town Sets 

6660: Hook and Haul Wrecker

June 23, 2025June 23, 2025 Master Builder

Year Released: 1989BricklinkInstructions

6872: Xenon X-Craft
Classic Space Classic Space Sets Official Sets Small Builds 

6872: Xenon X-Craft

October 19, 2019April 21, 2026 Master Builder
6135: Spy Shark
Aquashark Aquazone Aquazone Sets Official Sets Very Small Builds 

6135: Spy Shark

March 21, 2023March 21, 2023 Master Builder
Super Stunt Machine
Airport Classic Town Official Sets Race Small Builds Super Model Town 

Super Stunt Machine

March 8, 2025March 10, 2025 Master Builder
6035: Castle Guard
Black Falcons Castle Castle Sets Official Sets Small Builds 

6035: Castle Guard

December 27, 2021December 27, 2021 Master Builder
1793: Space Station Zenon
Large Builds Official Sets Space Unitron Unitron Sets 

1793: Space Station Zenon

April 19, 2021April 19, 2021 Master Builder
6876: Alienator
ABCs Bjarne Tveskov Blacktron Blacktron Sets Official Sets Small Builds Space 

6876: Alienator

November 16, 2019October 16, 2024 Master Builder
305: Two Crater Plates
Classic Space Classic Space Sets Official Sets Space Supplemental 

305: Two Crater Plates

March 6, 2026March 6, 2026 Master Builder
4767: Harry and the Hungarian Horntail
Goblet of Fire Harry Potter Harry Potter Sets Large Builds Official Sets 

4767: Harry and the Hungarian Horntail

May 16, 2023May 16, 2023 Master Builder
4150: FreeStyle Building Set
Box Plus FreeStyle FreeStyle Official Sets Official Sets Poster Small Builds 

4150: FreeStyle Building Set

December 17, 2025December 17, 2025 Master Builder
6812: Grid Trekkor
Bjarne Tveskov Blacktron II Blacktron II Sets Official Sets Space Very Small Builds 

6812: Grid Trekkor

February 12, 2021July 29, 2023 Master Builder
4544: Car Transport Wagon with Car
9V Medium Builds Official Sets Town Train Train Sets 

4544: Car Transport Wagon with Car

September 18, 2026September 18, 2026 Master Builder
6039: Twin Arm Launcher
Castle Castle Sets Lion Knights Official Sets Small Builds 

6039: Twin Arm Launcher

April 10, 2021April 10, 2021 Master Builder
2846: Indian Kayak
Indians Official Sets Very Small Builds Western Western Sets 

2846: Indian Kayak

October 10, 2023October 10, 2023 Master Builder
6909: Sonic Stinger with Promotional Mask
ABCs Box Plus Insectoids Insectoids Sets Mask Official Sets Small Builds Space 

6909: Sonic Stinger with Promotional Mask

October 4, 2024March 22, 2025 Master Builder
6360: Weekend Cottage
Building Classic Town Medium Builds Official Sets Town Town Sets 

6360: Weekend Cottage

October 19, 2019April 4, 2020 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.