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
Alternate Builds Harry Potter Harry Potter Alternate Builds Instructions Added Medium Builds Sorcerer's Stone 

4705 – Back A

June 12, 2024June 17, 2024 Master Builder 4864 Views

From: 4705: Snape’s Class
Name: Falling Floor Tower 1
Instructions: View PDF | Download .io File

Contributions

  1. Name, PDF and .io file submitted on June 12, 2024 by: penumbra12
  • ← 6332 – Back C
  • 4705 – Back B →

You May Also Like

6208 – Back A

August 26, 2024August 28, 2024 Master Builder

1966 – Back B

May 16, 2025May 16, 2025 Master Builder

6082 – Back B

January 13, 2022January 13, 2022 Master Builder

5988 – Back C

October 29, 2019April 4, 2020 Master Builder

6957 – Back B

August 31, 2022December 20, 2023 Master Builder

6929 – Back C

March 30, 2023March 31, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

3066 (Kabaya: Town Space Port 1): Cosmos Glider
Official Sets Space Port Town Very Small Builds 

3066 (Kabaya: Town Space Port 1): Cosmos Glider

February 28, 2025February 28, 2025 Master Builder

Year Released: 1999BricklinkInstructions *Alternate Builds are found on Kabaya: Town Space Port

2154: Robo Master
ABCs Box Story Large Builds Official Sets Robo Force Robo Force Sets Space 

2154: Robo Master

June 14, 2023February 11, 2025 Master Builder
1974: Legoland Triple Pack
Airport Bonus/Value Packs Castle Castle Sets Classic Town Forestmen Futron Sets Futuron Official Sets Small Builds Space Town 

1974: Legoland Triple Pack

September 7, 2023September 7, 2023 Master Builder
6592: Vacation Hideaway (Weekend Cottage)
Building Classic Town Official Sets Small Builds Town Town Sets 

6592: Vacation Hideaway (Weekend Cottage)

June 23, 2025June 23, 2025 Master Builder
7141: Naboo Fighter
Episode I Medium Builds Official Sets Star Wars Star Wars Sets 

7141: Naboo Fighter

December 29, 2021December 29, 2021 Master Builder
6046: Hemlock Stronghold
Castle Castle Sets Dark Forest Medium Builds Official Sets 

6046: Hemlock Stronghold

November 18, 2021November 18, 2021 Master Builder
6268: Renegade Runner
Medium Builds Official Sets Pirates Pirates I Pirates Sets 

6268: Renegade Runner

April 9, 2020July 13, 2021 Master Builder
6492: Hypno Cruiser
Medium Builds Official Sets Time Cruisers Time Cruisers Sets 

6492: Hypno Cruiser

December 29, 2021March 20, 2025 Master Builder
5925: Pontoon Plane
Adventurers Adventurers Sets Jungle Official Sets Small Builds 

5925: Pontoon Plane

March 5, 2026March 5, 2026 Master Builder
6160: Sea Scorpion
Aquazone Aquazone Sets Large Builds Official Sets Stingrays 

6160: Sea Scorpion

October 29, 2019April 4, 2020 Master Builder
1382: Scary Laboratory
Extra Large Builds Official Sets Studio Sets Studios 

1382: Scary Laboratory

August 10, 2026August 10, 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
1794 – Side R
Bonus/Value Packs Castle Castle Alternate Builds Dragon Knights Official Sets Small Builds 

1794 – Side R

March 30, 2026March 30, 2026 Master Builder
6431: Road Rescue
Official Sets Res-Q Small Builds Town Town Sets 

6431: Road Rescue

January 20, 2022January 20, 2022 Master Builder
6335: Indy Transport
Classic Town Medium Builds Official Sets Race Town Town Sets 

6335: Indy Transport

November 29, 2023November 29, 2023 Master Builder
6901: Mobile Lab
Classic Space Classic Space Sets Medium Builds Official Sets Space 

6901: Mobile Lab

September 11, 2020August 4, 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.