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
Idea Book Instructions Added Large Alt Build Large Builds Town Train 

Book 7777 – Page 48-49

February 22, 2022May 21, 2024 Master Builder 6196 Views


From: Idea Book 7777
Year Released: 1981

Build 1: Bridge 1
Instructions: View PDF | Download .io File

Build 2: Depot 2
Instructions: View PDF | Download .io File

Build 3: Signal Box 3 (Also on Page 30-31)
Instructions: View PDF

Contributions

  1. PDF and .io file submitted on February 22, 2022 by: Paul
  2. PDF and .io file submitted on February 22, 2022 by: Paul
  3. Name and PDF submitted on May 18, 2024 by: Iannis
  • ← Book 7777 – Page 42-43
  • Book 7777 – Page 56-57 →

You May Also Like

6263 – Back B

February 24, 2026March 3, 2026 Master Builder

6021 – Back C

September 25, 2024September 25, 2024 Master Builder

1793 – Back B

July 30, 2024August 8, 2024 Master Builder

6346 – Back A

October 5, 2023August 10, 2026 Master Builder

7180: B-wing at Rebel Control Center

August 17, 2023April 21, 2026 Master Builder

4719 – Back A

June 14, 2026June 23, 2026 Master Builder

EXPLORE MORE OFFICIAL SETS

6012: Siege Cart
Castle Castle Sets Lion Knights Official Sets Small Builds 

6012: Siege Cart

September 24, 2024September 24, 2024 Master Builder

Year Released: 1986BricklinkInstructions

6497: Twisted Time Train
Box Story Medium Builds Official Sets Time Cruisers Time Cruisers Sets 

6497: Twisted Time Train

March 17, 2025March 17, 2025 Master Builder
6894: Invader
Blacktron Blacktron Sets Medium Builds Official Sets 

6894: Invader

November 20, 2019November 20, 2019 Master Builder
6783: Sonar Transmitting Cruiser
ABCs Classic Space Classic Space Sets Large Builds Official Sets Space 

6783: Sonar Transmitting Cruiser

May 8, 2022August 15, 2023 Master Builder
6261: Raft Raiders
Medium Builds Official Sets Pirates Pirates I Pirates Sets 

6261: Raft Raiders

April 7, 2026April 7, 2026 Master Builder
6257: Castaway’s Raft
Niels Milan Pedersen Official Sets Pirates Pirates I Pirates Sets Small Builds 

6257: Castaway’s Raft

June 6, 2022July 29, 2023 Master Builder
6503: Sprint Racer
Official Sets Race Town Town Sets Very Small Builds 

6503: Sprint Racer

July 9, 2022July 9, 2022 Master Builder
6375: Trans Air Carrier
Cargo Classic Town Medium Builds Official Sets Town Town Sets 

6375: Trans Air Carrier

November 20, 2020November 20, 2020 Master Builder
7708: Uplink
Exo-Force Official Sets Small Builds 

7708: Uplink

August 11, 2023August 11, 2023 Master Builder
1371: Spinosaurus Attack Studio
Jurassic Park III Medium Builds Official Sets Studio Alternate Builds Studio Sets Studios 

1371: Spinosaurus Attack Studio

January 6, 2022June 4, 2024 Master Builder
7725: Electric Passenger Train
12V Large Builds Official Sets Town Train Train Sets 

7725: Electric Passenger Train

December 29, 2021July 26, 2022 Master Builder
770: Rescue Set
Hospital LEGOLAND Medium Builds Official Sets 

770: Rescue Set

September 15, 2022February 14, 2024 Master Builder
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
7115: Gungan Patrol
Episode I Official Sets Small Builds Star Wars Star Wars Sets 

7115: Gungan Patrol

January 12, 2021April 22, 2026 Master Builder
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

January 22, 2021March 14, 2025 Master Builder
4751: Harry and the Marauder’s Map
Harry Potter Harry Potter Sets Official Sets Prisoner of Azkaban Small Builds 

4751: Harry and the Marauder’s Map

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.