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

Airport Alternate Builds LEGOLAND LEGOLAND Alternate Builds Small Builds

371-3 – Top B

October 8, 2024October 8, 2024 Master Builder 3265 Views

From: 371: Seaplane
Name: TBD
Submitted by: USER
Instructions

← 371-3 – Top A
371-3 – Bottom A →

You May Also Like

6563 – Back A

July 20, 2022July 20, 2022 Master Builder

1728 (6145) – Back B

August 1, 2023August 1, 2023 Master Builder

6054 – Back B

April 10, 2021April 26, 2023 Master Builder

6848 – Back D

March 11, 2024March 11, 2024 Master Builder

6453 – Back A

August 2, 2020October 25, 2021 Master Builder

6345 – Back C

January 29, 2021September 15, 2022 Master Builder

EXPLORE MORE OFFICIAL SETS

Extra Large Builds Official Sets Spider-Man Spider-Man 2 Spider-Man Sets

4856: Doc Ock’s Hideout

December 16, 2025December 16, 2025 Master Builder

Year Released: 2004BricklinkInstructions

Cowboys Medium Builds Official Sets Western Western Sets

6755: Sheriff’s Lock-Up

July 3, 2024February 18, 2025 Master Builder

Classic Space Classic Space Sets Official Sets Space Very Small Builds

885: Space Scooter

January 27, 2024January 27, 2024 Master Builder

Classic Town Official Sets Supplemental Town

6347: Monorail Accessory Track

August 27, 2023August 27, 2023 Master Builder

Classic Town Extra Large Builds Gas Station Official Sets Town Town Sets Wrecker

6397: Gas N’ Wash Express

July 14, 2021July 14, 2021 Master Builder

Bjarne Tveskov Futron Sets Futuron Medium Builds Official Sets

6925: Interplanetary Rover

September 25, 2019July 29, 2023 Master Builder

Classic Space Classic Space Sets Large Builds Official Sets

6940: Alien Moon Stalker

September 12, 2019September 12, 2024 Master Builder

Bonus/Value Packs Classic Space Classic Space Sets Duplicate Set Number Official Sets Small Builds Space

1967: System Bonus Pack

February 13, 2025February 13, 2025 Master Builder

Episode I Official Sets Star Wars Star Wars Sets Very Small Builds

7203: Jedi Defense I

June 27, 2022June 27, 2022 Master Builder

Medium Builds Official Sets Studio Sets Studios

1381: Vampire’s Crypt

July 2, 2024July 2, 2024 Master Builder

Classic Space Classic Space Sets Medium Builds Official Sets

6930: Space Supply Station

September 13, 2019September 11, 2023 Master Builder

Classic Town Medium Builds Official Sets Town Town Sets Traffic

379: Bus Station

April 10, 2021May 31, 2023 Master Builder

Box Story Large Builds Official Sets Robo Force Robo Force Sets Space

2153: Robo Stalker

June 15, 2023April 3, 2024 Master Builder

Castle Castle Sets Lion Knights Official Sets Small Builds

6010: Supply Wagon

July 13, 2021July 13, 2021 Master Builder

Large Builds M:Tron M:Tron Alternate Builds M:Tron Sets Official Sets Space Super Model

6862: Secret Space Voyager

July 29, 2023July 29, 2023 Master Builder

Classic Town Official Sets Small Builds Town Town Sets Traffic

6668: Recycle Truck

November 18, 2020November 18, 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.