Diagonal in Lime and Black
This module was created because I had a 16x16 plate left over. I have set myself the goal of building a module on...
GBC Module Catalog
The most comprehensive listing of Great Ball Contraption modules
Recently Updated Modules
GBC Phoenix
Mini Hubless Conveyor GBC
This module is originally by my friend Dunes (AKA: Brick Engineering). I have shortened it to about half the original...
Serpiente GBC
This is designed originally by FernandoQ. Dunes, Berthil, and NDLGBC have each made their own versions of it, this...
Serpiente GBC
This is designed originally by FernandoQ. Dunes, Berthil, and NDLGBC have each made their own versions of it, this...
Cannon/Shooter v2.1
GBC Mini Wave - Workshop Module, Stein Hanse e.V. LUG, World Record
In June 2024, almost by chance rather than deliberate planning, I built the first version of this module in a...
The Only Prescription
Unwound
A series of rotating axle lifts around the large rack gears fixed in a studless frame An initial inbox has a conveyor...
54 Vertical Conveyor Lift from set 42146
Straight Shooter
Flipswitch
About the Great Ball Catalog
Great Ball Contraptions (GBC) modules are custom-built LEGO machines that transport small LEGO balls through creative mechanisms.
This catalog is the world’s most comprehensive resource for GBC modules, featuring hundreds of modules from dozens of builders, a lot of them with build instructions. Whether you’re a seasoned builder or just discovering the hobby, you’ll find hundreds of unique designs to explore and build.
Start browsing to discover the amazing variety and ingenuity of the global GBC community.