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

1626 – Back D
Alternate Builds Holiday and Event Holiday and Event Alternate Builds Very Small Builds 

1626 – Back D

March 4, 2023March 4, 2023 Master Builder
6232 – Back A
Alternate Builds Pirates Pirates Alternate Builds Pirates I Very Small Builds 

6232 – Back A

July 13, 2021July 13, 2021 Master Builder
2532 – Back A
Airport Alternate Builds Classic Town Medium Builds Town Town Alternate Builds 

2532 – Back A

December 28, 2021December 28, 2021 Master Builder
6088 – Back B
Alternate Builds Large Builds Ninja Ninja Alternate Builds 

6088 – Back B

January 24, 2022January 24, 2022 Master Builder
6803 – Back C
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Very Small Builds 

6803 – Back C

September 21, 2019February 15, 2026 Master Builder
6842 – Back B
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Small Alt Build Small Builds 

6842 – Back B

October 21, 2019October 25, 2021 Master Builder
4883 – Instructions H
Alternate Builds Designer Sets Designer Sets Alternate Builds Instructions Added Small Alt Build Small Builds 

4883 – Instructions H

August 2, 2021August 28, 2024 Master Builder

NEW INSTRUCTIONS ADDED!View All

  • 42089 – Back A
    2 in 1 Alternate Builds Alternate Instructions Included Instructions Added Medium Builds Technic Technic Alternate Builds 

    42089 – Back A

  • 8064 – Inside A
    Alternate Builds Instructions Added Medium Alt Build Medium Builds Technic Technic Alternate Builds 

    8064 – Inside A

  • 6980 – Back F
    Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Large Alt Build Large Builds Space 

    6980 – Back F

  • 6980 – Back D
    Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

    6980 – Back D

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

    4558 – Inside B

42089 – Back A42089 – Back A8064 – Inside A8064 – Inside A6980 – Back F6980 – Back F6980 – Back D6980 – Back D4558 – Inside B4558 – Inside B

NEW OFFICIAL SETS ADDED!View All

42089: Power Boat
2 in 1 Medium Builds Official Sets Technic Technic Sets 

42089: Power Boat

August 28, 2026August 28, 2026 Master Builder

Year Released: 2019BricklinkInstructions

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

NEW ALTERNATE BUILDS ADDED!View All

42089 – Back A
2 in 1 Alternate Builds Alternate Instructions Included Instructions Added Medium Builds Technic Technic Alternate Builds 

42089 – Back A

August 28, 2026August 28, 2026 Master Builder
8064 – Inside A
Alternate Builds Instructions Added Medium Alt Build Medium Builds Technic Technic Alternate Builds 

8064 – Inside A

August 27, 2026September 4, 2026 Master Builder
6980 – Back F
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Large Alt Build Large Builds Space 

6980 – Back F

August 25, 2026August 26, 2026 Master Builder
6980 – Back D
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6980 – Back D

August 25, 2026August 26, 2026 Master Builder
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

STAR WARSView All

7115 – Back A
Alternate Builds Episode I Instructions Added Small Alt Build Small Builds Star Wars Star Wars Alternate Builds 

7115 – Back A

April 8, 2026April 22, 2026 Master Builder

From: 7115: Gungan PatrolName: Gungan Outpost Instructions: View PDF | Download .io File

HARRY POTTERView All

4720 – Back B
Alternate Builds Chamber of Secrets Harry Potter Harry Potter Alternate Builds Instructions Added Very Small Alt Build Very Small Builds 

4720 – Back B

June 14, 2026June 23, 2026 Master Builder

From: 4720: Knockturn AlleyName: Desk Instructions: View PDF | Download .io File

INSTRUCTIONS ADDEDView All

Book 260 – Page 48-49
Futuron Futuron Alternate Builds Idea Book Instructions Added Small Alt Build Space 

Book 260 – Page 48-49

6755 – Back B
Alternate Builds Cowboys Instructions Added Medium Alt Build Medium Builds Western Western Alternate Builds 

6755 – Back B

6054 – Back B
Alternate Builds Castle Castle Alternate Builds Forestmen Instructions Added Medium Alt Build Medium Builds Royal Knights 

6054 – Back B

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

6529 – Back C

Book 7777 – Cover
Idea Book Instructions Added Race Town Train 

Book 7777 – Cover

6048 – Back B
Alternate Builds Castle Castle Alternate Builds Dragon Knights Instructions Added Medium Alt Build Medium Builds 

6048 – Back B

6939 – Back B
Alternate Builds Instructions Added Medium Alt Build Medium Builds Spyrius Spyrius Alternate Builds 

6939 – Back B

194 – Instructions A
Alternate Builds Building Set with People Building Set with People Alternate Builds Instructions Added Small Alt Build Small Builds 

194 – Instructions A

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

6380 – Back B

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

6529 – Back A

8675 – Back B
Alternate Builds Instructions Added Racers Racers Alternate Builds Radio Control Small Alt Build Small Builds 

8675 – Back B

6685 – Back A
Alternate Builds Classic Town Fire Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6685 – Back A

6892 – Back C
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Medium Alt Build Medium Builds Space 

6892 – 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

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

6988 – Back C

6155 – Back D
Alternate Builds Aquashark Aquazone Aquazone Alternate Builds Instructions Added Small Alt Build Small Builds 

6155 – Back D

6983 – Back C
Alternate Builds Ice Planet 2002 Ice Planet 2002 Alternate Builds Instructions Added Large Alt Build Large Builds 

6983 – Back C

6895 – Back B
Alternate Builds Instructions Added Medium Alt Build Medium Builds Space Space Police I Space Police I Alternate Builds 

6895 – Back B

920 – Back C
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Medium Alt Build Medium Builds Space 

920 – Back C

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

1785 – Back A

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

6824 – 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

4582 – Instructions B
Alternate Builds Drome Racers Instructions Added Racers Racers Alternate Builds Very Small Alt Build Very Small Builds 

4582 – Instructions B

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

6440 – Back A

6263 – Back C
Alternate Builds Imperial Guards Instructions Added Medium Alt Build Medium Builds Pirates Pirates Alternate Builds Pirates I 

6263 – Back C

Book 6000 – Page 8-9
Classic Town Idea Book Instructions Added Town 

Book 6000 – Page 8-9

6648 – Back C
Alternate Builds Classic Town Instructions Added Race Small Alt Build Small Builds Town Town Alternate Builds 

6648 – Back C

6829 – Back A
Alternate Builds Instructions Added Small Alt Build Small Builds Space UFO UFO Alternate Builds 

6829 – Back A

6951 – Back D
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Large Alt Build Large Builds Space 

6951 – Back D

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

8369 – Inside C

7150 – Instructions 2
Alternate Builds Instructions Added Medium Alt Build Medium Builds Star Wars Star Wars Alternate Builds 

7150 – Instructions 2

6668 – Back C
Alternate Builds Classic Town Instructions Added Small Alt Build Small Builds Town Town Alternate Builds Traffic 

6668 – Back C

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

4709 – Back C

194 – Instructions B
Alternate Builds Building Set with People Building Set with People Alternate Builds Instructions Added Small Alt Build Small Builds 

194 – Instructions B

6810 – Back A
Alternate Builds Futuron Futuron Alternate Builds Instructions Added Very Small Alt Build Very Small Builds 

6810 – Back A

6546 – Back C
Alternate Builds Instructions Added Town Town Alternate Builds Very Small Alt Build Very Small Builds 

6546 – Back C

6561 – Back A
Alternate Builds Instructions Added Medium Alt Build Medium Builds Town Town Alternate Builds 

6561 – Back A

7128 – Back A
Alternate Builds Episode IV/V/VI Instructions Added Small Alt Build Small Builds Star Wars Star Wars Alternate Builds 

7128 – Back A

6509 – Back A
Alternate Builds Instructions Added Town Town Alternate Builds Very Small Alt Build Very Small Builds 

6509 – Back A

6823 – Back C
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Very Small Alt Build Very Small Builds 

6823 – Back C

6027 – Back C
Alternate Builds Castle Castle Alternate Builds Fright Knights Instructions Added Small Alt Build Small Builds 

6027 – Back C

920 – Back G
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Small Alt Build Small Builds Space 

920 – Back G

6264 – Back C
Alternate Builds Instructions Added Islanders Medium Alt Build Medium Builds Pirates Pirates Alternate Builds Pirates I 

6264 – Back C

6258 – Back A
Alternate Builds Instructions Added Pirates Pirates Alternate Builds Pirates I Small Alt Build Small Builds 

6258 – Back A

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

720 – Inside B

6923 – Back C
Alternate Builds Instructions Added M:Tron M:Tron Alternate Builds Medium Alt Build Medium Builds Space 

6923 – Back C

6885 – Back D
Alternate Builds Futuron Futuron Alternate Builds Instructions Added Small Alt Build Small Builds Space 

6885 – Back D

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

6208 – Back A

6048 – Back A
Alternate Builds Castle Castle Alternate Builds Dragon Knights Instructions Added Medium Alt Build Medium Builds 

6048 – Back A

6894 – Back A
Alternate Builds Blacktron Blacktron Alternate Builds Instructions Added Medium Alt Build Medium Builds 

6894 – Back A

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

6115 – Back C

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

6542 – Back D

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

1490 – Back E

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

6246 – Back B

720 – Side L
Alternate Builds Basic Instructions Added LEGOLAND Alternate Builds Medium Alt Build Medium Builds Universal Building Set Universal Building Set Alternate Builds 

720 – Side L

6881 – Back D
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Small Alt Build Small Builds Space 

6881 – Back D

1616 – Back C
Alternate Builds Bonus/Value Pack Alternate Builds Futuron Futuron Alternate Builds Instructions Added Small Builds Space 

1616 – Back C

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

6352 – Back C

6889 – Back B
Alternate Builds Instructions Added Medium Alt Build Medium Builds Space Spyrius Spyrius Alternate Builds 

6889 – Back B

6740 – Back B
Alternate Builds Alternate Instructions Included Instructions Added Island Xtreme Stunts Island Xtreme Stunts Alternate Builds Medium Alt Build Medium Builds 

6740 – Back B

6381 – Back B
Alternate Builds Instructions Added Medium Alt Build Medium Builds Town Town Alternate Builds 

6381 – Back B

6815 – Back C
Alternate Builds Exploriens Exploriens Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6815 – Back C

Viva’s Space Scooter
Alternate Instructions Included Classic Space Classic Space Alternate Builds Comic Book Instructions Added Jim Spaceborn Space 

Viva’s Space Scooter

6980 – Back F
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Large Alt Build Large Builds Space 

6980 – Back F

6898 – Back C
Alternate Builds Ice Planet 2002 Ice Planet 2002 Alternate Builds Instructions Added Medium Alt Build Medium Builds Space 

6898 – Back C

6885 – Back C
Alternate Builds Futuron Futuron Alternate Builds Instructions Added Small Alt Build Small Builds Space 

6885 – Back C

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

4708 – Back C

6055 – Back C
Alternate Builds Castle Castle Alternate Builds Instructions Added Lion Knights Small Alt Build Small Builds 

6055 – Back C

7121 – Back A
Alternate Builds Episode I Instructions Added Small Alt Build Small Builds Star Wars Star Wars Alternate Builds 

7121 – Back A

6808 – Back A
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6808 – Back A

6244 – Back A
Alternate Builds Imperial Armada Instructions Added Pirates Pirates Alternate Builds Small Alt Build Small Builds 

6244 – Back A

6663 – Back A
Alternate Builds Classic Town Harbor Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6663 – Back A

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

6981 – Back C

1732 – Back B
Alternate Builds Castle Castle Alternate Builds Dragon Knights Instructions Added Very Small Alt Build Very Small Builds 

1732 – Back B

8675 – Back C
Alternate Builds Instructions Added Racers Racers Alternate Builds Radio Control Small Alt Build Small Builds 

8675 – Back C

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

5550 – Back A

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

6929 – Back D

6552 – Back B
Alternate Builds Classic Town Instructions Added Large Builds Recreation Town Town Alternate Builds 

6552 – Back B

6854 – Back A
Alternate Builds Exploriens Exploriens Alternate Builds Instructions Added Small Alt Build Small Builds Space 

6854 – Back A

7725 – Inside B
Alternate Builds Instructions Added Medium Alt Build Medium Builds Train Train Alternate Builds 

7725 – Inside B

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

6986 – Back D

6871 – Back D
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Small Alt Build Small Builds Space 

6871 – Back D

6663 – Back C
Alternate Builds Classic Town Harbor Instructions Added Small Alt Build Small Builds Town Town Alternate Builds 

6663 – Back C

Book 6000 – Page 4-5
Classic Town Idea Book Instructions Added Medium Alt Build Town 

Book 6000 – Page 4-5

6018 – Back A
Alternate Builds Castle Castle Alternate Builds Instructions Added Small Alt Build Small Builds 

6018 – Back A

1843 – Side R
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

7140 – Instructions 2
Alternate Builds Instructions Added Medium Alt Build Medium Builds Star Wars Star Wars Alternate Builds 

7140 – Instructions 2

6155 – Back A
Alternate Builds Aquashark Aquazone Aquazone Alternate Builds Instructions Added Small Alt Build Small Builds 

6155 – Back A

6037 – Back C
Alternate Builds Castle Castle Alternate Builds Fright Knights Instructions Added Small Alt Build Small Builds 

6037 – Back C

6940 – Back A
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Medium Alt Build Medium Builds 

6940 – Back A

4707 – Back C
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4707 – Back C

6790 – Back A
Alternate Builds Cowboys Instructions Added Very Small Alt Build Very Small Builds Western Western Alternate Builds 

6790 – Back A

6041 – Back A
Alternate Builds Castle Castle Alternate Builds Instructions Added Lion Knights Small Alt Build Small Builds 

6041 – Back A

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

6542 – Back B

6842 – Back B
Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Small Alt Build Small Builds 

6842 – Back B

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

6831 – Back C

6155 – Back C
Alternate Builds Aquashark Aquazone Aquazone Alternate Builds Instructions Added Small Alt Build Small Builds 

6155 – Back C

6836 – Back B
Alternate Builds Instructions Added Small Alt Build Small Builds UFO UFO Alternate Builds 

6836 – Back B

6923 – Back B
Alternate Builds Instructions Added M:Tron M:Tron Alternate Builds Medium Alt Build Medium Builds Space 

6923 – Back B

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

6899 – Back B

EXPLORE MORE OFFICIAL SETS

6528: Sand Storm Racer
Official Sets Race Town Town Sets Very Small Builds 

6528: Sand Storm Racer

July 8, 2022July 8, 2022 Master Builder

Year Released: 1989BricklinkInstructions

5581: Magic Flash
Extra Large Builds Model Team Model Team Sets Official Sets 

5581: Magic Flash

January 2, 2024January 2, 2024 Master Builder
7473: Street Sprinter vs. Mutant Lizard
Dino Attack Official Sets Small Builds 

7473: Street Sprinter vs. Mutant Lizard

March 21, 2023March 21, 2023 Master Builder
6776: Ogel Control Center
Alpha Team Alpha Team Sets Large Builds Official Sets 

6776: Ogel Control Center

February 12, 2024February 12, 2024 Master Builder
4479: TIE Bomber
Episode IV/V/VI Large Builds Official Sets Star Wars Star Wars Sets 

4479: TIE Bomber

January 6, 2025January 6, 2025 Master Builder
7300 (1414, 7308, Kabaya: Life On Mars 1): Double Hover
Life on Mars Life on Mars Sets Official Sets Very Small Builds 

7300 (1414, 7308, Kabaya: Life On Mars 1): Double Hover

February 24, 2025February 25, 2025 Master Builder
6061: Siege Tower
Castle Castle Sets Lion Knights Medium Builds Official Sets 

6061: Siege Tower

January 6, 2022January 6, 2022 Master Builder
6713: Grip-n-Go Challenge
Large Builds Official Sets Race Town Town Sets 

6713: Grip-n-Go Challenge

February 10, 2025February 10, 2025 Master Builder
5909: Treasure Raiders set with Mummy Storage Container
Adventurers Adventurers Sets Box Plus Desert Medium Builds Official Sets Storage Container 

5909: Treasure Raiders set with Mummy Storage Container

October 8, 2024October 10, 2024 Master Builder
6740: Xtreme Tower
Island Xtreme Stunts Island Xtreme Stunts Sets Large Builds Official Sets 

6740: Xtreme Tower

April 16, 2026April 16, 2026 Master Builder
6361: Mobile Crane
Classic Town Construction Medium Builds Official Sets Town Town Sets 

6361: Mobile Crane

April 9, 2020April 9, 2020 Master Builder
7203: Jedi Defense I
Episode I Official Sets Star Wars Star Wars Sets Very Small Builds 

7203: Jedi Defense I

June 27, 2022June 27, 2022 Master Builder
1526: Unknown (Space Radar Buggy)
Classic Space Classic Space Sets Official Sets Small Builds Space 

1526: Unknown (Space Radar Buggy)

August 20, 2025August 29, 2025 Master Builder
1843-2: {Spyrius Unknown}
Bonus/Value Pack Sets Official Sets Small Builds Space Spyrius Spyrius Sets 

1843-2: {Spyrius Unknown}

September 8, 2023September 13, 2023 Master Builder
1382: Scary Laboratory
Extra Large Builds Official Sets Studio Sets Studios 

1382: Scary Laboratory

August 10, 2026August 10, 2026 Master Builder
4750: Draco’s Encounter with Buckbeak
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

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.