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Back of the Box Builds

LEGO Alternate Builds!

SETS
- Adventurers
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- BIONICLE
- Building Set with People
- Castle
- Duplo
- Fabuland
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- LEGOLAND
- Model Team
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- Technic
- Train
- Town
- Universal Building Set
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THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP

2 in 1 Alternate Builds Alternate Instructions Included Instructions Added Medium Builds Technic Technic Alternate Builds

42089 – Back A

August 28, 2026August 28, 2026 Master Builder 3709 Views

From: 42089: Power Boat
Name: Hydroplane
Instructions: View PDF (Official LEGO Instructions)

← 42089: Power Boat

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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
Train
Town
Universal Building Set
Western
More Sets
Misc

Useful Links

Submit Instructions!
New Instructions
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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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