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 Instructions Added Large Alt Build Large Builds Model Team Model Team Alternate Builds

5521 – Back A

January 29, 2026January 31, 2026 Master Builder 3475 Views

From: 5521: Sea Jet
Name: TBD ¹
Instructions: View PDF | Download .io File

Contributions

Name, PDF and .io file submitted on January 29, 2026 by: livi

← Space Skeletal Horse Concept

You May Also Like

6595 – Back A

April 9, 2020April 9, 2020 Master Builder

194 – Back D

October 4, 2019November 18, 2021 Master Builder

6885 – Back D

June 5, 2023June 6, 2023 Master Builder

1896: Trauma Team

April 4, 2022April 4, 2022 Master Builder

928 – Back D

November 25, 2020October 13, 2021 Master Builder

920 – Back E

February 2, 2021October 25, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

Blacktron II Blacktron II Alternate Builds Blacktron II Sets Jørn Thomsen Large Builds Official Sets Space Super Model

6861: Blacktron Super Model

July 29, 2023July 29, 2023 Master Builder

Year Released: 1991Designer: Jørn ThomsenBricklinkInstructions

Official Sets Paradisa Town Town Sets Very Small Builds

1761: Paradisa Speedboat

April 10, 2023April 10, 2023 Master Builder

Imperial Soldiers Official Sets Pirates Pirates I Pirates Sets Small Builds

6265: Sabre Island

May 28, 2024May 28, 2024 Master Builder

Classic Town Extra Large Builds Official Sets Town Town Sets Traffic

6393: Big-Rig Truck Stop

June 28, 2022June 28, 2022 Master Builder

Classic Town Construction Official Sets Small Builds Town Town Sets

6662: Backhoe

July 8, 2022July 8, 2022 Master Builder

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

7139: Ewok Attack

June 27, 2022February 24, 2023 Master Builder

Ice Planet 2002 Ice Planet 2002 Sets Jørn Thomsen Medium Builds Official Sets Space

6898: Ice-Sat V

June 8, 2020July 29, 2023 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

Classic Town Medium Builds Official Sets Police Town Town Sets

6344: Jet Speed Justice

October 8, 2024October 8, 2024 Master Builder

Classic Town Food and Drink Official Sets Small Builds Town Town Sets

6683: Burger Stand

May 1, 2024May 1, 2024 Master Builder

Classic Town Official Sets Police Small Builds Town Town Sets

6642: Police Helicopter

April 8, 2020April 8, 2020 Master Builder

Medium Builds Official Sets Paradisa Town Town Sets

6404: Carriage Ride

January 6, 2025January 6, 2025 Master Builder

ABCs Classic Space Classic Space Sets Large Builds Official Sets Space

6783: Sonar Transmitting Cruiser

May 8, 2022August 15, 2023 Master Builder

Classic Town Medium Builds Official Sets Police Town Town Sets

6354: Pursuit Squad

February 9, 2022February 9, 2022 Master Builder

Episode IV/V/VI Extra Large Builds Official Sets Star Wars Star Wars Sets

6211: Imperial Star Destroyer

February 6, 2024February 7, 2024 Master Builder

Futron Sets Futuron Official Sets Small Builds Space

6828: Twin-Winged Spoiler

November 20, 2019May 25, 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.