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LEGO Alternate Builds!

SETS
- Adventurers
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- BIONICLE
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- Castle
- Duplo
- Fabuland
- Harry Potter
- Holiday and Event
- LEGOLAND
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- Space
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- Technic
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- Universal Building Set
- Western
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THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

ABCs Aquanauts Aquazone Aquazone Sets Box Plus Official Sets Playscape/Play Stage Box Small Builds

1728 (6145): Crystal Crawler {with Aqua Playscape}

August 1, 2023March 22, 2025 Master Builder 6109 Views

Year Released: 1996
Bricklink
Instructions

*Alternate Build Connection: Aqua 5

Playscape/Play Stage Box

Back A

Back A

← 1906: Majisto’s Tower
1728 (6145) – Back A →

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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

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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.

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