Skip to content

Back of the Box Builds

LEGO Alternate Builds!

SETS
- Adventurers
- Aquazone
- 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
THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

Bonus/Value Pack Alternate Builds Castle Castle Alternate Builds Instructions Added Official Sets Royal Knights Small Alt Build Small Builds Space Spyrius Spyrius Alternate Builds

1843 – Side R

January 22, 2021March 14, 2025 Master Builder 5302 Views

From: 1843: Space / Castle Value Pack
Name: Space / Castle Catapult and Tracking Station ¹
Instructions: View PDF | Download .io File

Contributions

Name, PDF, and .io file submitted on January 29, 2021 by: Mr.AstonishedRaccoon

← 1843 – Side L
1843 – Bottom →

You May Also Like

6844: Seismologic Vehicle (Sismobile)

October 22, 2019September 10, 2023 Master Builder

6397 – Back E

August 18, 2022May 17, 2023 Master Builder

1761: Paradisa Speedboat

April 10, 2023April 10, 2023 Master Builder

6953 – Back D

May 16, 2023May 17, 2023 Master Builder

6081: King’s Mountain Fortress

June 30, 2022July 29, 2023 Master Builder

6335: Indy Transport

November 29, 2023November 29, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

Black Falcons Castle Castle Sets Daniel August Krentz Large Builds Official Sets

6073: Knight’s Castle

October 23, 2019July 29, 2023 Master Builder

Year Released: 1984Designer: Daniel August KrentzBricklinkInstructions

Large Builds Official Sets Space Unitron Unitron Sets

1793: Space Station Zenon

April 19, 2021April 19, 2021 Master Builder

M:Tron M:Tron Sets Official Sets Space Very Small Builds

6811: Pulsar Charger

April 17, 2020April 17, 2020 Master Builder

Airport Classic Town Large Builds Official Sets Town Town Sets

6345: Aerial Acrobats

January 29, 2021September 15, 2022 Master Builder

Chamber of Secrets Harry Potter Harry Potter Sets Medium Builds Official Sets

4733: The Dueling Club

March 3, 2023March 3, 2023 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds Space

1498: Spy-Bot

March 11, 2024March 11, 2024 Master Builder

Bonus/Value Pack Sets Classic Town Official Sets Small Builds Town Town Sets Traffic

1876: Soil Scooper

October 11, 2021September 7, 2023 Master Builder

Official Sets Town Town Sets Very Small Builds

6546: Slick Racer

May 23, 2022May 23, 2022 Master Builder

Castle Castle Sets Dark Forest Medium Builds Official Sets

6046: Hemlock Stronghold

November 18, 2021November 18, 2021 Master Builder

Classic Town Official Sets Small Builds Town Town Sets Traffic

6668: Recycle Truck

November 18, 2020November 18, 2020 Master Builder

ABCs Insectoids Insectoids Sets Official Sets Small Builds Space

6907: Sonic Stinger

October 3, 2024March 22, 2025 Master Builder

Episode IV/V/VI Official Sets Small Builds Star Wars Star Wars Sets

7128: Speeder Bikes

July 14, 2021July 14, 2021 Master Builder

Large Builds M:Tron M:Tron Sets Official Sets Space

6956: Stellar Recon Voyager

September 23, 2019November 19, 2020 Master Builder

Official Sets Scala Scala Alternate Builds Scala Sets Small Builds

3152: Playroom for the Baby Thomas

July 10, 2024July 10, 2024 Master Builder

Box Plus Mask Medium Builds Official Sets UFO UFO Sets

6999: Cyber Saucer with Promotional Mask

December 16, 2025December 16, 2025 Master Builder

Imperial Armada Official Sets Pirates Pirates Sets Small Builds

6244: Armada Sentry

November 16, 2019April 4, 2020 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

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
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.