Skip to content
Back of the Box Builds

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
    • 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 Chamber of Secrets Harry Potter Harry Potter Alternate Builds Instructions Added Small Builds 

4735 – Back A

June 12, 2024June 17, 2024 Master Builder 3408 Views

From: 4735: Slytherin
Name: Slytherin Secrets 1
Instructions: View PDF | Download .io File

Contributions

  1. Name, PDF and .io file submitted on June 12, 2024 by: penumbra12
  • ← 4709 – Back C
  • 4735 – Back B →

You May Also Like

6630 – Back A

October 13, 2021October 13, 2021 Master Builder

535 – Bottom

May 16, 2023May 16, 2023 Master Builder

1620-2 – Back C

October 21, 2021October 21, 2021 Master Builder

385-2: Build-N-Store Chest

September 8, 2025September 8, 2025 Master Builder

6280 – Back C

July 13, 2021February 20, 2025 Master Builder

3676 – Back B

March 1, 2025March 1, 2025 Master Builder

EXPLORE MORE OFFICIAL SETS

6024: Bandit Ambush
Castle Castle Sets Dark Forest Official Sets Small Builds 

6024: Bandit Ambush

April 16, 2021April 16, 2021 Master Builder

Year Released: 1996BricklinkInstructions

6615: Eagle Stunt Flyer
Airport Classic Town Official Sets Small Builds Town Town Sets 

6615: Eagle Stunt Flyer

January 5, 2022January 5, 2022 Master Builder
4706: Forbidden Corridor
Harry Potter Harry Potter Sets Large Builds Official Sets Sorcerer's Stone 

4706: Forbidden Corridor

February 27, 2023February 27, 2023 Master Builder
6285: Black Seas Barracuda
Box Story Extra Large Builds Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets 

6285: Black Seas Barracuda

August 3, 2023February 20, 2025 Master Builder
6984: Galactic Mediator
ABCs Box Marketing Blurb Jørn Thomsen Large Builds Official Sets Space Space Police II Space Police II Sets 

6984: Galactic Mediator

March 18, 2022June 23, 2025 Master Builder
6989: Mega Core Magnetizer (Multi Core Magentizer)
Box Marketing Blurb Extra Large Builds Jørn Thomsen M:Tron M:Tron Sets Official Sets 

6989: Mega Core Magnetizer (Multi Core Magentizer)

September 15, 2019February 18, 2026 Master Builder
6970: Beta-1 Command Base
Classic Space Classic Space Sets Large Builds Official Sets Space 

6970: Beta-1 Command Base

January 20, 2021January 20, 2021 Master Builder
510: Basic Building Set
Basic Official Sets Small Builds Universal Building Set 

510: Basic Building Set

July 11, 2024July 11, 2024 Master Builder
6370: Weekend Home
Building Classic Town Medium Builds Official Sets Town Town Sets 

6370: Weekend Home

February 17, 2023February 19, 2023 Master Builder
6817: Beta Buzzer
ABCs Insectoids Insectoids Sets Official Sets Space Very Small Builds 

6817: Beta Buzzer

June 1, 2022March 22, 2025 Master Builder
885: Space Scooter
Classic Space Classic Space Sets Official Sets Space Very Small Builds 

885: Space Scooter

January 27, 2024January 27, 2024 Master Builder
4502: X-wing Fighter (Dagobah)
Episode IV/V/VI Extra Large Builds Official Sets Star Wars Star Wars Sets 

4502: X-wing Fighter (Dagobah)

May 15, 2023May 15, 2023 Master Builder
6999: Cyber Saucer with Promotional Mask
Box Plus Mask Medium Builds Official Sets UFO UFO Sets 

6999: Cyber Saucer with Promotional Mask

December 16, 2025December 16, 2025 Master Builder
6355: Derby Trotter
Classic Town Medium Builds Official Sets Recreation Town Town Sets 

6355: Derby Trotter

December 28, 2021December 28, 2021 Master Builder
6060: Knight’s Challenge
Castle Castle Sets Lion Knights Medium Builds Official Sets 

6060: Knight’s Challenge

July 2, 2024October 1, 2024 Master Builder
6829: Radon Rover
ABCs Official Sets Small Builds Space UFO UFO Sets 

6829: Radon Rover

August 4, 2020March 22, 2025 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
  • 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.