The Great Ball Contraption Wiki
avatar Log in

Main Page

From The Great Ball Contraption Wiki
A GBC Collaboration

What is a Great Ball Contraption?

A great ball contraption (GBC) is a machine which receives soccer balls or basketballs from one module and passes them to another module, rather like a bucket brigade. Modules built according to the GBC standard can be assembled into a collaborative display without pre-planning or modification. The GBC standard is minimal, permitting the builder great flexibility in designing the mechanism by which balls are moved from the input to the output. The otherwise pointless handling of balls, and the myriad ways this is accomplished, gives great ball contraptions the impression of a Rube Goldberg machine.

a stair stepper module

Upcoming GBC Events

North America



  • BrisBricks Brisbane LEGO Fan Expo 2017 - 30th September to 2nd October 2017, Chandler Arena, Sleeman Sports Complex, Brisbane QLD, Australia.
  • Brickvention 2018. January 20-21 2018, Royal Exhibition Building, Carlton VIC.
  • Japan Brickfest 2018 -Kobe Fan Weekend-. June 9-10, 2018, Rokko Island, Kobe, Japan

See also Past Events.

Edit events


Contributing QR Code
The Great Ball Contraption Wiki is your web site! Add the GBC content you want to see. We are kindly hosted by Brickimedia, so your Brickimedia/ShoutWiki account is all you need. How you can make this site better:
  • Spread the word!

Facts about "Main Page"