Skip to content

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

4735 – Back A

June 12, 2024June 17, 2024 Master Builder 3844 Views

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

Contributions

Name, PDF and .io file submitted on June 12, 2024 by: penumbra12

← 4709 – Back C
4735 – Back B →

You May Also Like

6989 – Back C

November 29, 2023April 4, 2024 Master Builder

4501 – Back A

December 29, 2021December 29, 2021 Master Builder

6380 – Back C

February 14, 2023February 19, 2023 Master Builder

6363 – Back B

February 17, 2023February 18, 2023 Master Builder

7781 – Instructions A

March 27, 2026March 27, 2026 Master Builder

725 – Back B

July 22, 2024July 22, 2024 Master Builder

EXPLORE MORE OFFICIAL SETS

Bonus/Value Packs Imperial Guards Official Sets Pirates Pirates Alternate Builds Pirates I Small Builds

1795 – Side R

March 30, 2026March 30, 2026 Master Builder

From: 1723: Castle / Pirates Combi PackName: TBDSubmitted by: USERInstructions

Life on Mars Life on Mars Sets Medium Builds Official Sets Space

7314: Recon-Mech RP

July 14, 2021July 14, 2021 Master Builder

Designer Sets Designer Sets Alternate Builds Designer Sets Set Medium Builds Official Sets

4883: Gear Grinders

August 2, 2021August 2, 2021 Master Builder

Classic Town Hospital Medium Builds Official Sets Town Town Sets

6356: Med-Star Rescue Plane

March 16, 2022March 16, 2022 Master Builder

Classic Town Official Sets Race Town Town Sets Very Small Builds

3056: Go-Kart

July 26, 2020July 26, 2020 Master Builder

Castle Castle Sets Fright Knights Official Sets Small Builds

6037: Witch’s Windship

December 29, 2021December 29, 2021 Master Builder

Black Knights Castle Castle Sets Medium Builds Official Sets

6057: Sea Serpent

April 14, 2025April 14, 2025 Master Builder

ABCs Bjarne Tveskov Blacktron Blacktron Sets Large Builds Official Sets Space

6954: Renegade

September 7, 2020October 16, 2024 Master Builder

Official Sets Small Builds Star Wars Star Wars Sets

7124: Flash Speeder

November 15, 2019November 15, 2019 Master Builder

Classic Town Medium Builds Official Sets Recreation Town Town Sets

6355: Derby Trotter

December 28, 2021December 28, 2021 Master Builder

Medium Builds Official Sets Outback Town Town Sets

6553: Crisis News Crew

December 4, 2023December 4, 2023 Master Builder

Classic Space Classic Space Sets Official Sets Small Builds Space

6880: Surface Explorer

May 4, 2020May 4, 2020 Master Builder

Island Xtreme Stunts Island Xtreme Stunts Sets Medium Builds Official Sets

6738: Skateboard Challenge

April 13, 2026April 13, 2026 Master Builder

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

7144: Slave I

October 28, 2021October 28, 2021 Master Builder

Classic Town Gas Station Medium Builds Official Sets Town Town Sets Wrecker

6594: Gas Transit

November 19, 2020July 8, 2025 Master Builder

Medium Builds Official Sets Paradisa Town Town Sets

6405: Sunset Stables

September 15, 2022September 15, 2022 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
BATMAN
Bionicle
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.