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

BACK OF THE BOX BUILDS

6555 – Back B
Alternate Builds Divers Town Town Alternate Builds Very Small Builds 

6555 – Back B

February 8, 2023February 8, 2023 Master Builder
1978 – Back A
Alternate Builds Holiday and Event Holiday and Event Alternate Builds Small Builds 

1978 – Back A

April 28, 2023April 28, 2023 Master Builder
2152 – Back A
Alternate Builds Large Builds Robo Force Robo Force Alternate Builds Space 

2152 – Back A

January 14, 2021January 14, 2021 Master Builder
6039 – Back B
Alternate Builds Castle Castle Alternate Builds Instructions Added Lion Knights Small Alt Build Small Builds 

6039 – Back B

August 18, 2023August 22, 2023 Master Builder
6135 – Back C
Alternate Builds Aquashark Aquazone Aquazone Alternate Builds Instructions Added Small Alt Build Small Builds 

6135 – Back C

April 27, 2023May 19, 2023 Master Builder
6985 – Back E
Alternate Builds Classic Space Classic Space Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space 

6985 – Back E

September 28, 2019May 19, 2023 Master Builder
4733 – Back A
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Small Builds 

4733 – Back A

March 3, 2023March 3, 2023 Master Builder

NEW INSTRUCTIONS ADDED!View All

  • 4558 – Inside B
    Alternate Builds Alternate Instructions Included Extra Large Alt Build Extra Large Builds Instructions Added Train Train Alternate Builds 

    4558 – Inside B

  • Book 7777 – Page 66-67
    Idea Book Instructions Added Large Alt Build Large Builds Town Train 

    Book 7777 – Page 66-67

  • 4563 – Back A
    Alternate Builds Instructions Added Large Alt Build Large Builds Train Train Alternate Builds 

    4563 – Back A

  • 6900 – Back B
    Alternate Builds Instructions Added Medium Alt Build Medium Builds Space UFO UFO Alternate Builds 

    6900 – Back B

  • 6348 – Back E
    Alternate Builds Classic Town Instructions Added Police Town Town Alternate Builds Very Small Alt Build Very Small Builds 

    6348 – Back E

4558 – Inside B4558 – Inside BBook 7777 – Page 66-67Book 7777 – Page 66-674563 – Back A4563 – Back A6900 – Back B6900 – Back B6348 – Back E6348 – Back E

NEW OFFICIAL SETS ADDED!View All

4558: Metroliner
9V Extra Large Builds Official Sets Town Train Train Sets 

4558: Metroliner

August 11, 2026August 11, 2026 Master Builder

Year Released: 1991BricklinkInstructions

4537: Twin Tank Transport
9V Medium Builds Official Sets Train Train Sets 

4537: Twin Tank Transport

August 10, 2026August 10, 2026 Master Builder

Year Released: 1993BricklinkInstructions

6571: Flame Fighters
Box Story Classic Town Fire Large Builds Official Sets Town Town Sets 

6571: Flame Fighters

August 10, 2026August 10, 2026 Master Builder

Year Released: 1994BricklinkInstructions The box reads, “The emergency call goes out, but who will be the first to respond? With building sets

NEW ALTERNATE BUILDS ADDED!View All

4558 – Inside B
Alternate Builds Alternate Instructions Included Extra Large Alt Build Extra Large Builds Instructions Added Train Train Alternate Builds 

4558 – Inside B

August 11, 2026August 11, 2026 Master Builder
4558 – Inside A
Alternate Builds Extra Large Builds Train Train Alternate Builds 

4558 – Inside A

August 11, 2026August 11, 2026 Master Builder
4558 – Back A
Alternate Builds Extra Large Builds Train Train Alternate Builds 

4558 – Back A

August 11, 2026August 11, 2026 Master Builder
4537 – Back B
Alternate Builds Medium Builds Train Train Alternate Builds 

4537 – Back B

August 10, 2026August 10, 2026 Master Builder
4537 – Back A
Alternate Builds Medium Builds Train Train Alternate Builds 

4537 – Back A

August 10, 2026August 10, 2026 Master Builder
6571 – Inside D
Alternate Builds Classic Town Fire Small Builds Town Town Alternate Builds 

6571 – Inside D

August 10, 2026August 10, 2026 Master Builder
6571 – Inside C
Alternate Builds Classic Town Fire Large Builds Town Town Alternate Builds 

6571 – Inside C

August 10, 2026August 10, 2026 Master Builder
6571 – Inside B
Alternate Builds Classic Town Fire Large Builds Town Town Alternate Builds 

6571 – Inside B

August 10, 2026August 10, 2026 Master Builder
6571 – Inside A
Alternate Builds Classic Town Fire Large Builds Town Town Alternate Builds 

6571 – Inside A

August 10, 2026August 10, 2026 Master Builder
6419 – Inside C
Alternate Builds Large Builds Paradisa Town Town Alternate Builds 

6419 – Inside C

August 10, 2026August 10, 2026 Master Builder

STAR WARSView All

7261 – Back A
Alternate Builds Episode III Large Builds Star Wars Star Wars Alternate Builds 

7261 – Back A

March 1, 2023March 3, 2023 Master Builder

From: 7261: Clone Turbo TankName: TBDSubmitted by: USERInstructions:

HARRY POTTERView All

4708 – Instructions A
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Small Alt Build Small Builds Sorcerer's Stone 

4708 – Instructions A

August 1, 2024August 8, 2024 Master Builder

From: 4708: Hogwarts ExpressName: Wizard Car Instructions: View PDF | Download .io File

INSTRUCTIONS ADDEDView All

6818 – Back C
Alternate Builds Instructions Added Small Builds Space UFO UFO Alternate Builds Very Small Alt Build 

6818 – Back C

6340 – Back D
Alternate Builds Classic Town Fire Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6340 – Back D

Book 6000 – Page 46-47
Classic Town Idea Book Instructions Added Small Alt Build Town 

Book 6000 – Page 46-47

6988 – Back A
Alternate Builds Blacktron II Blacktron II Alternate Builds Instructions Added Large Alt Build Large Builds 

6988 – Back A

4708 – Back C
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Large Alt Build Large Builds Sorcerer's Stone 

4708 – Back C

6814 – Back C
Alternate Builds Ice Planet 2002 Ice Planet 2002 Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6814 – Back C

1490 – Back E
Alternate Builds Classic Town Instructions Added Medium Alt Build Medium Builds Town Town Alternate Builds Traffic 

1490 – Back E

6899 – Back C
Alternate Builds Alternate Instructions Included Exploriens Exploriens Alternate Builds Instructions Added Medium Alt Build Medium Builds Space 

6899 – Back C

7700 – Inside A
Alternate Builds Exo-Force Exo-Force Alternate Builds Instructions Added Medium Builds 

7700 – Inside A

6831 – Back A
Alternate Builds Instructions Added Space Space Police I Space Police I Alternate Builds Very Small Alt Build Very Small Builds 

6831 – Back A

6190 – Back B
Alternate Builds Aquashark Aquazone Aquazone Alternate Builds Instructions Added Large Alt Build Large Builds 

6190 – Back B

6832 – Back B
Alternate Builds Blacktron II Blacktron II Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6832 – Back B

6036 – Back B
Castle Castle Alternate Builds Instructions Added Royal Knights Small Builds 

6036 – Back B

1916 (3015) – Back A
Alternate Builds Instructions Added Space Space Police II Space Police II Alternate Builds Very Small Alt Build Very Small Builds 

1916 (3015) – Back A

6379 – Back C
Alternate Builds Building Classic Town Instructions Added Medium Alt Build Medium Builds Town Town Alternate Builds 

6379 – Back C

6043 – Back A
Alternate Builds Castle Castle Alternate Builds Dragon Knights Instructions Added Medium Alt Build Medium Builds 

6043 – Back A

6073 – Back A
Alternate Builds Castle Castle Alternate Builds Instructions Added Large Alt Build Large Builds 

6073 – Back A

6929 – Back A
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Medium Alt Build Medium Builds 

6929 – Back A

7180 – Instructions 4
Alternate Builds Alternate Instructions Included Episode IV/V/VI Instructions Added Medium Alt Build Medium Builds Star Wars Star Wars Alternate Builds 

7180 – Instructions 4

6666 – Back A
Alternate Builds Classic Town Hospital Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6666 – Back A

6981 – Back B
Alternate Builds Blacktron II Blacktron II Alternate Builds Instructions Added Large Alt Build Large Builds Space 

6981 – Back B

6685 – Catalog 1
Alternate Builds Classic Town Fire Instructions Added Town Town Alternate Builds Very Small Alt Build Very Small Builds 

6685 – Catalog 1

6666 – Back B
Alternate Builds Classic Town Hospital Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6666 – Back B

6737 – Back B
Alternate Builds Alternate Instructions Included Instructions Added Island Xtreme Stunts Island Xtreme Stunts Alternate Builds Medium Alt Build Medium Builds 

6737 – Back B

6440 – Back A
Airport Alternate Builds Classic Town Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6440 – Back A

6373 – Back D
Alternate Builds Classic Town Instructions Added Medium Alt Build Medium Builds Town Town Alternate Builds Traffic 

6373 – Back D

6852 – Back A
Alternate Builds Instructions Added Small Alt Build Small Builds Space Space Police II Space Police II Alternate Builds 

6852 – Back A

6394 – Back D
Alternate Builds Classic Town Gas Station Instructions Added Large Alt Build Large Builds Town Town Alternate Builds 

6394 – Back D

6067 – Inside B
Alternate Builds Castle Castle Alternate Builds Instructions Added Large Alt Build Large Builds Lion Knights 

6067 – Inside B

6829 – Back C
Alternate Builds Instructions Added Small Builds Space UFO UFO Alternate Builds 

6829 – Back C

Book 250 – Page 28-29
Alternate Instructions Included Classic Space Classic Space Alternate Builds Idea Book Instructions Added Small Alt Build Space 

Book 250 – Page 28-29

7701 – Inside A
Alternate Builds Exo-Force Exo-Force Alternate Builds Instructions Added Medium Builds 

7701 – Inside A

6115 – Back B
Alternate Builds Aquashark Aquazone Aquazone Alternate Builds Instructions Added Very Small Alt Build Very Small Builds 

6115 – Back B

6208 – Back B
Alternate Builds Episode IV/V/VI Instructions Added Large Alt Build Large Builds Star Wars Star Wars Alternate Builds 

6208 – Back B

6876 – Back B
Alternate Builds Blacktron Blacktron Alternate Builds Instructions Added Small Alt Build Small Builds Space 

6876 – Back B

6879 – Back B
Alternate Builds Ice Planet 2002 Ice Planet 2002 Alternate Builds Instructions Added Small Alt Build Small Builds 

6879 – Back B

6380 – Back A
Alternate Builds Classic Town Hospital Instructions Added Medium Alt Build Medium Builds Town Town Alternate Builds 

6380 – Back A

Book 7777 – Page 48-49
Idea Book Instructions Added Large Alt Build Large Builds Town Train 

Book 7777 – Page 48-49

6542 – Back D
Alternate Builds Classic Town Harbor Instructions Added Medium Alt Build Medium Builds Town Town Alternate Builds 

6542 – Back D

4708 – Back B
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Large Alt Build Large Builds Sorcerer's Stone 

4708 – Back B

6834 – Back A
Alternate Builds Ice Planet 2002 Ice Planet 2002 Alternate Builds Instructions Added Small Alt Build Small Builds Space 

6834 – Back A

6352 – Back D
Alternate Builds Classic Town Construction Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6352 – Back D

6260 – Back A
Alternate Builds Instructions Added Pirates Pirates Alternate Builds Pirates I Small Alt Build Small Builds 

6260 – Back A

6541 – Back C
Alternate Builds Classic Town Harbor Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6541 – Back C

6077-2 – Back B
Alternate Builds Castle Castle Alternate Builds Instructions Added Large Alt Build Large Builds 

6077-2 – Back B

6078 – Back C
Castle Castle Alternate Builds Cool Creations Instructions Added Large Alt Build Large Builds LEGO Magazine Royal Knights 

6078 – Back C

6341 – Back C
Airport Alternate Builds Classic Town Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6341 – Back C

4735 – Back B
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Instructions Added Small Builds 

4735 – Back B

Book 6000 – Page 70-71
Classic Space Classic Space Alternate Builds Idea Book Instructions Added Medium Alt Build Space 

Book 6000 – Page 70-71

6021 – Back A
Alternate Builds Castle Castle Alternate Builds Instructions Added Very Small Alt Build Very Small Builds 

6021 – Back A

4706 – Back B
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4706 – Back B

6276 – Back C
Alternate Builds Extra Large Alt Build Extra Large Builds Imperial Soldiers Instructions Added Pirates Pirates Alternate Builds Pirates I 

6276 – Back C

6953 – Back D
Alternate Builds Futuron Futuron Alternate Builds Instructions Added Medium Alt Build Medium Builds Space 

6953 – Back D

6803 – Back B
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Very Small Alt Build Very Small Builds 

6803 – Back B

550-2 – Back D
Alternate Builds Building Instructions Added LEGOLAND LEGOLAND Alternate Builds Medium Alt Build Medium Builds 

550-2 – Back D

6957 – Back B
ABCs Alternate Builds Instructions Added Medium Alt Build Medium Builds Space Space Police II Space Police II Alternate Builds 

6957 – Back B

6824 – Back B
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6824 – Back B

1785 – Back A
Alternate Builds Instructions Added Small Alt Build Small Builds Space Spyrius Spyrius Alternate Builds Unitron Unitron Alternate Builds 

1785 – Back A

6273 – Back D
Alternate Builds Instructions Added Large Alt Build Large Builds Pirates Pirates Alternate Builds Pirates I 

6273 – Back D

6987 – Back A
Alternate Builds Blacktron Blacktron Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added 

6987 – Back A

5550 – Back A
Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Model Team Model Team Alternate Builds 

5550 – Back A

720 – Inside C
Alternate Builds Basic Instructions Added LEGOLAND Alternate Builds Medium Alt Build Medium Builds Universal Building Set Universal Building Set Alternate Builds 

720 – Inside C

1731 – Back B
Alternate Builds Ice Planet 2002 Ice Planet 2002 Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

1731 – Back B

6076 – Back D
Alternate Builds Castle Castle Alternate Builds Dragon Knights Instructions Added Medium Alt Build Medium Builds 

6076 – Back D

8369 – Inside A
Alternate Builds Instructions Added Racers Racers Alternate Builds Radio Control Small Alt Build Small Builds 

8369 – Inside A

4704 – Back A
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4704 – Back A

6666 – Back C
Alternate Builds Classic Town Hospital Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6666 – Back C

897 – Back D
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Small Alt Build Small Builds Space 

897 – Back D

4709 – Back C
Alternate Builds Extra Large Builds Harry Potter Harry Potter Alternate Builds Instructions Added Sorcerer's Stone 

4709 – Back C

6235 – Back C
Alternate Builds Instructions Added Pirates Pirates Alternate Builds Pirates I Very Small Alt Build Very Small Builds 

6235 – Back C

6042 – Back A
Alternate Builds Castle Castle Alternate Builds Crusaders Instructions Added Small Alt Build Small Builds 

6042 – Back A

6529 – Back C
Airport Alternate Builds Classic Town Instructions Added Town Town Alternate Builds Very Small Alt Build Very Small Builds 

6529 – Back C

7143 – Back B
Alternate Builds Episode II Instructions Added Small Alt Build Small Builds Star Wars Star Wars Alternate Builds 

7143 – Back B

4592 – Back B
Alternate Builds Drome Racers Instructions Added Racers Racers Alternate Builds Small Alt Build Very Small Alt Build Very Small Builds 

4592 – Back B

6687 – Back E
Airport Alternate Builds Classic Town Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6687 – Back E

6581 – Back C
Alternate Builds Classic Town Construction Instructions Added Town Town Alternate Builds Very Small Alt Build Very Small Builds 

6581 – Back C

7256 – Back A
Alternate Builds Episode III Instructions Added Medium Alt Build Medium Builds Star Wars Star Wars Alternate Builds 

7256 – Back A

6012 – Back C
Alternate Builds Castle Castle Alternate Builds Instructions Added Lion Knights Very Small Alt Build Very Small Builds 

6012 – Back C

6938 – Back C
Alternate Builds Exploriens Exploriens Alternate Builds Instructions Added Medium Alt Build Medium Builds 

6938 – Back C

6246 – Back A
Alternate Builds Instructions Added Islanders Pirates Pirates Alternate Builds Pirates I Small Alt Build Small Builds 

6246 – Back A

1491 – Back B
Alternate Builds Black Knights Castle Castle Alternate Builds Instructions Added Small Alt Build Small Builds 

1491 – Back B

6234 – Back A
Alternate Builds Instructions Added Pirates Pirates Alternate Builds Pirates I Very Small Alt Build Very Small Builds 

6234 – Back A

6826 – Back B
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6826 – Back B

Book 250 – Page 42-43
Alternate Instructions Included Castle Castle Alternate Builds Idea Book Instructions Added 

Book 250 – Page 42-43

6985 – Back B
Alternate Builds Classic Space Classic Space Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space 

6985 – Back B

6986 – Back B
Alternate Builds Extra Large Alt Build Extra Large Builds Instructions Added Space Space Police I Space Police I Alternate Builds 

6986 – Back B

6533 – Back C
Alternate Builds Classic Town Instructions Added Police Town Town Alternate Builds Very Small Alt Build Very Small Builds 

6533 – Back C

6035 – Back C
Alternate Builds Black Falcons Castle Castle Alternate Builds Instructions Added Small Alt Build Small Builds 

6035 – Back C

6820 – Back A
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6820 – Back A

720 – Back E
Alternate Builds Basic Instructions Added LEGOLAND Alternate Builds Medium Alt Build Medium Builds Universal Building Set Universal Building Set Alternate Builds 

720 – Back E

6484 – Back A
Alternate Builds Classic Town Instructions Added Race Small Alt Build Small Builds Town Town Alternate Builds 

6484 – Back A

6899 – Back A
Alternate Builds Exploriens Exploriens Alternate Builds Instructions Added Medium Alt Build Medium Builds Space 

6899 – Back A

6390 – Back D
Alternate Builds Classic Town Instructions Added Small Alt Build Small Builds Town Town Alternate Builds Traffic 

6390 – Back D

6950 – Inside A
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Medium Alt Build Medium Builds Space 

6950 – Inside A

6780 – Back B
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Medium Alt Build Medium Builds Space 

6780 – Back B

6368 – Back C
Airport Alternate Builds Classic Town Instructions Added Medium Alt Build Medium Builds Town Town Alternate Builds 

6368 – Back C

6257 – Back A
Alternate Builds Instructions Added Pirates Pirates Alternate Builds Pirates I Small Alt Build Small Builds 

6257 – Back A

6542 – Back A
Alternate Builds Classic Town Extra Large Alt Build Extra Large Builds Harbor Instructions Added Town Town Alternate Builds 

6542 – Back A

6043 – Back B
Alternate Builds Castle Castle Alternate Builds Dragon Knights Instructions Added Medium Alt Build Medium Builds 

6043 – Back B

6234 – Back C
Alternate Builds Instructions Added Pirates Pirates Alternate Builds Pirates I Very Small Alt Build Very Small Builds 

6234 – Back C

EXPLORE MORE OFFICIAL SETS

6669: Diesel Daredevil
Classic Town Official Sets Race Small Builds Town Town Sets 

6669: Diesel Daredevil

March 17, 2022March 17, 2022 Master Builder

Year Released: 1991BricklinkInstructions

6662: Backhoe
Classic Town Construction Official Sets Small Builds Town Town Sets 

6662: Backhoe

July 8, 2022July 8, 2022 Master Builder
4539: Manual Level Crossing
9V Medium Builds Official Sets Town Train Train Sets 

4539: Manual Level Crossing

May 22, 2026May 22, 2026 Master Builder
6340: Hook & Ladder
Classic Town Fire Medium Builds Official Sets Town Town Sets 

6340: Hook & Ladder

December 29, 2021December 29, 2021 Master Builder
2551: Grandma’s Kitchen
Duplo Duplo Sets Official Sets Playhouse Small Builds 

2551: Grandma’s Kitchen

February 27, 2023February 27, 2023 Master Builder
6986: Mission Commander
Bjarne Tveskov Extra Large Builds Official Sets Space Space Police I Space Police I Sets 

6986: Mission Commander

April 3, 2022July 29, 2023 Master Builder
2161: Aqua Dozer
Aquaraiders I Aquazone Aquazone Sets Large Builds Official Sets 

2161: Aqua Dozer

January 8, 2020April 4, 2020 Master Builder
7259: ARC-170 Starfighter
Episode III Large Builds Official Sets Star Wars Star Wars Sets 

7259: ARC-170 Starfighter

March 1, 2023March 1, 2023 Master Builder
6481: Construction Crew
Classic Town Construction Medium Builds Official Sets Town Town Sets 

6481: Construction Crew

April 9, 2020July 4, 2022 Master Builder
6985: Cosmic Fleet Voyager
ABCs Classic Space Classic Space Sets Extra Large Builds Official Sets 

6985: Cosmic Fleet Voyager

September 12, 2019August 16, 2023 Master Builder
1628: Santa on Sleigh with Reindeer
Holiday and Event Holiday and Event Sets Official Sets Small Builds 

1628: Santa on Sleigh with Reindeer

November 25, 2020July 25, 2024 Master Builder
6267: Lagoon Lock-Up
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
6341: Gas N’ Go Flyer
Airport Classic Town Official Sets Small Builds Town Town Sets 

6341: Gas N’ Go Flyer

December 27, 2021December 27, 2021 Master Builder
6012: Siege Cart
Castle Castle Sets Lion Knights Official Sets Small Builds 

6012: Siege Cart

September 24, 2024September 24, 2024 Master Builder
8926: Toa Undersea Attack
BIONICLE BIONICLE Sets Large Builds Official Sets Playsets 

8926: Toa Undersea Attack

March 3, 2026March 3, 2026 Master Builder
5581: Magic Flash
Extra Large Builds Model Team Model Team Sets Official Sets 

5581: Magic Flash

January 2, 2024January 2, 2024 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.