Lego GBC by Lawrie George

Lego GBC or Lego Great Ball Contraption is a form of Rube Goldberg machine where the aim is to move Lego sports balls from one machine to another.

The standard defines the rate of ball flow as well as the input and output bin sizes, and by having a standard it allows anyone to build a GBC module that they can then bring to collaborative displays.

Getting Started

Resources for getting started in Lego GBC.

GBC Modules

GBC modules I have built.

GBC Instructions

GBC modules with instructions.

Recent Posts

Lego GBC Batch Counter

November 5th, 2020|0 Comments

Lego GBC Batch Counter is a Lego Great Ball Contraption Module built for the Great Ball Pit - Challenge 2020, and is a module designed to output a batch of exactly 13 balls (or [...]

Bricks by the Bay Vision 2020 (Virtual)

August 31st, 2020|Comments Off on Bricks by the Bay Vision 2020 (Virtual)

Bricks by the Bay took their show online this year and I got to present some highlights of my GBC loop like my lowered GBC section to the attendies. [...]

Brickworld Virtual June 2020

June 28th, 2020|Comments Off on Brickworld Virtual June 2020

In my third Brickworld Virtual outing this year, I took viewers through a series of crowd favorite modules as well as unpacking my Lego GBC Scrolling Display, however, the highlight of this show was my [...]

Seeing Lego Great Ball Contraption Shows

Lego Great Ball Contraption is a global phenomenon and shows happen throughout the year, to find an event near you see the links below.

Public Events

Public Events are where you can see Lego GBC modules in action.
(To participate you will need to contact the event organizer.)

AFOL Events

Adult Fan of Lego Conventions where you can meet other Lego GBC enthusiasts.
(They typically have Public days where you will help run a GBC loop.)

Coordinating GBC Shows

Coordinating GBC layouts can be a lot of fun and a lot of work, see the links below for my notes on the equipment and collateral needed for running GBC shows.

Coordinating GBC Shows

All the supporting modules, equipment, and collateral needed to run a show.

GBC utility Modules

Lego GBC Utility Modules including Reservoirs, Trains, Bridges, and Returns.

GBC Gear

GBC Gear including instructions, stickers, postcards and more.