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

Alternate Builds Large Builds Model Team Model Team Alternate Builds

5521 – Back A

January 12, 2021January 12, 2021 Master Builder 3446 Views

From: 5521: Sea Jet
Name: TBD
Submitted by: USER
Instructions

← 5521: Sea Jet
7115: Gungan Patrol →

You May Also Like

1875 – Back A

October 11, 2021September 7, 2023 Master Builder

6982 – Back D

November 9, 2019November 9, 2019 Master Builder

6683 – Back A

May 1, 2024May 1, 2024 Master Builder

7252 – Back B

November 9, 2024November 10, 2024 Master Builder

5521: Sea Jet

January 12, 2021January 12, 2021 Master Builder

6662 – Back B

July 8, 2022July 13, 2022 Master Builder

EXPLORE MORE OFFICIAL SETS

Classic Town Hospital Large Builds Official Sets Town Town Sets

6380: Emergency Treatment Center (St. Mary’s Hospital)

July 15, 2022July 15, 2022 Master Builder

Year Released: 1987BricklinkInstructions

Extra Large Builds Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets

6286: Skull’s Eye Schooner

February 8, 2022July 29, 2023 Master Builder

Daniel August Krentz Imperial Soldiers Medium Builds Official Sets Pirates Pirates I Pirates Sets

6267: Lagoon Lock-Up

October 11, 2021July 29, 2023 Master Builder

Box Plus Harry Potter Harry Potter Sets Official Sets Playscape/Play Stage Box Small Builds Sorcerer's Stone

4723: Diagon Alley Shops

July 10, 2024October 8, 2024 Master Builder

12V Large Builds Official Sets Town Train Train Sets

7725: Electric Passenger Train

December 29, 2021July 26, 2022 Master Builder

Castle Castle Sets Official Sets Royal Knights Very Small Builds

1752: Boat with Armor

April 10, 2023April 10, 2023 Master Builder

Black Knights Castle Castle Sets Official Sets Very Small Builds

6009: Black Knight

April 9, 2020April 9, 2020 Master Builder

Drome Racers Official Sets Racers Small Builds

4594: Maverick Sprinter & Hot Arrow

February 21, 2025February 21, 2025 Master Builder

Bonus/Value Pack Sets Castle Castle Sets Forestmen Official Sets Small Builds

1877: Crusader’s Cart

October 11, 2021September 24, 2024 Master Builder

Classic Town Construction Official Sets Town Town Sets Very Small Builds

6512: Landscape Loader

May 10, 2022May 10, 2022 Master Builder

Classic Space Classic Space Sets Official Sets Very Small Builds

6824: Space Dart I

September 30, 2019October 6, 2019 Master Builder

Harry Potter Harry Potter Sets Official Sets Prisoner of Azkaban Very Small Builds

4750: Draco’s Encounter with Buckbeak

May 16, 2023May 16, 2023 Master Builder

Islanders Medium Builds Official Sets Pirates Pirates I Pirates Sets

6264: Forbidden Cove

July 1, 2022July 1, 2022 Master Builder

Airport Classic Town Medium Builds Official Sets Town Town Sets

6440: Jetport Fire Squad

December 29, 2021December 29, 2021 Master Builder

Castle Castle Sets Lion Knights Official Sets Small Builds

6012: Siege Cart

September 24, 2024September 24, 2024 Master Builder

Exo-Force Medium Builds Official Sets

8114: Chameleon Hunter

December 12, 2025January 6, 2026 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.